With today's high-tech weaponry, it is hard to conceive that a weapon developed over 1,300 years ago cannot, to this day, be reproduced by scientists. Its development proved timely, however, in saving Constantinople from an Arab invasion. Interestingly too, despite 21st-century technological advancements, Muslims today rely upon a 1,300-year-old weapon of their own to launch a new invasion.

With the Byzantine Empire lacking a large naval force and facing a huge invading Muslim fleet, an inventor offered the emperor a weapon known as "Greek Fire." Shot from a siphon cannon onboard a ship, the fiery liquid stuck to whatever it struck – even the water – and continued to burn. Only dousing its flames with sand extinguished it. Heavily damaged by this weapon, the Muslim fleet retreated, unsuccessful in imposing Islam upon the Byzantinians. Over time, the inventor's formula was lost with no one able to duplicate it since.

For Westerners, it is difficult to grasp that followers of a religion, founded 1,400 years ago on the premise it was to be imposed upon the entire world, would continue – unabated over time – with this global caliphate mandate. We have tragically witnessed some Muslim fanatics, such as al-Qaida and the Islamic State (IS), committed to doing this through violence, leave their devastating imprint upon humanity.

Also difficult for Westerners to grasp is that "peaceful" Muslim groups are similarly motivated. Their intent, allegedly, is achieving this end through non-violence – tempered only as they await increasing Muslim numbers enabling them to act more forcefully. They recognize the futility today of fighting a superior military force and, thus, rely on a "stealth" weapon their ancestors used centuries earlier. That weapon is "hijrah," or "conquest by immigration." Seeking to supplant a host nation's population, it is the modern-day equivalent of the Trojan horse.

Simply put, these Muslims see no reason to risk battlefield defeat when hijrah allows for eventual victory over time to influence the host nation's governance. Ironically, as Western countries open their floodgates to immigrants, the Islamic domination denied centuries earlier by Greek Fire simply walks right in today.

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Most influential among these peaceful groups is the Muslim Brotherhood. While promoting the image of renouncing violence, it has given rise to numerous violent splinter groups, such as al-Qaida and IS. The split stems from Islamists' belief direct violence provides a shorter road to establishing the caliphate than non-violence. Muslim Brotherhood's image of non-violence is undermined by its 2010 declaration of war against the U.S.

Today, a once-secret battle plan – inadvertently discovered in 2004 – is being implemented by the Brotherhood against the U.S, seeking to impose Shariah and Islam upon us through:

"[The] Establishment of Islam in North America, meaning establishing an effective and stable Islamic Movement led by the Muslim Brotherhood which adopts Muslims' causes domestically and globally … and supports the global Islamic state. ...

"The process of … (achieving the above) is a 'Civilization-Jihadist Process.' ... The Brotherhood must understand that their work in America is a kind of grand Jihad in eliminating and destroying the Western civilization from within and 'sabotaging' its miserable house by their [own] hands and the hands of the believers so that it is eliminated and Allah's religion is made victorious over all other religions. ..."

For 14 years, we have done nothing to stop this, allowing Shariah and Islam to creep into some states' legal and education systems.

In New Jersey, a judge outrageously applied Shariah law, sanctioning a husband's belief in his right to repeatedly rape his wife, denying the ex-wife's request for a permanent restraining order. Meanwhile, state educators in Colorado, eager to demonstrate their tolerance for Islam, incredulously, replaced the English-speaking version of the Pledge of Allegiance with one in Arabic – replacing "under God" with "under Allah."

As "Shariah creep" advances into our legal and educational institutions, most Americans prove irresponsibly reluctant to study Islam to learn how it threatens us. One really need only consider a core belief from which differing value systems for Muslims and non-Muslims flow: human rights.

This, perhaps, is best illustrated in a poster, depicting hundreds of Muslims praying in the streets of a Western city. They do so without concern their actions block ingress/egress by non-Muslims in the area – justifying it as an exercise of a minority's religious rights. The poster reads: "In every country where Muslims are a minority, they are obsessed with (their) minority rights. In every country where Muslims are a majority, there are no minority rights."

Nothing makes Islam's stand on human rights clearer: Human rights are for Muslims, not non-Muslims. This is evidenced by a 1948 United Nations declaration – the Universal Declaration of Human Rights (UDHR), setting a universal standard for all human life as equal – passing without a single negative vote. However, in 1990, 56 Organization of Islamic Cooperation member states effectively revoked their UDHR support, affirming such rights exist only as recognized under Shariah – i.e., Muslims only.

Muslims believe Islam's superiority mandates all other religions become subservient to it under a global caliphate. This superiority manifests itself in zero tolerance for other religions. This is why many Muslim states ban other religions, destroy their houses of worship or persecute non-Muslims. While Muslim groups affiliated with the Brotherhood are quick to raise unwarranted concerns about Islamophobia in the West, non-Muslims have no voice to raise Muslims' phobia about non-Muslim religions in Muslim countries.

It is baffling why, in an effort to demonstrate Western tolerance, we accept an immigrant population with an intolerant ideology it seeks to impose upon us. Ironically, they perceive our tolerance of their intolerance as acceptance of Islam as a superior religion. While we may not intend to feed into this perception, we do. Muslims see welfare benefit payments as recognizing Islam's superiority. They see us accept that "infidels" are "unclean," requiring Guantanamo guards wear gloves to deliver Qurans to prisoners. Contributing too to this trend is Western countries' censoring criticism of Islam.

Western countries have accepted Trojan horses of Muslim immigrants committed to fulfilling Islam's call for hijrah. For fear of being labeled Islamophobic, we heed the advice of Muslims who tell us "not to look a gift horse in the mouth." But, failing to do so will leave a future generation of our descendants wondering how we could have been so foolish not to.