(NBC NEWS) As debate grows over the extremism of some armed factions battling to overthrow Syrian President Bashar Assad’s regime, an incendiary illustration on the Facebook page of one such group leaves little doubt where its leaders envision the uprising ending – with masked Islamic fighters marching through Washington, D.C., as the U.S. Capitol burns in the background.

The image is one of eight photos posted on the official Facebook page of the “Al-Aqsa Islamic Brigades,” a small armed Sunni rebel faction fighting with the Free Syrian Army, the main umbrella military organization of the opposition forces. Two other photos posted on the group’s page feature the widely recognized black flag of the al Qaeda in Iraq terrorist group, which operates freely in Syria.

Evan Kohlmann, a senior partner with the security firm Flashpoint Intelligence and an NBC consultant on terrorism, who discovered the image on Facebook and provided it to NBC News’ investigative unit, said Al-Aqsa has not been designated as a terrorist group by the United States. But he noted that it fights alongside another Free Syrian Army force, the Tawhid Brigade, that has been linked to Jabhat al-Nusra, one of two rebel factions labeled terrorist groups by the U.S. government.

Should Congress give Obama authority to attack Syria? Yes, the U.S. should do everything possible to topple Bashar Assad's regime

Yes, this is a humanitarian mission of the highest order

Yes, Syria's use of chemical weapons must be stopped at all costs

Yes, the U.S. will never be taken seriously again if we don’t back up our posturing

Yes, House Speaker John Boehner is right: Only the U.S. has the capability to stop Assad

Yes, how can anyone look at innocent, suffering children and not act?

Yes, even the Republican leadership is in favor of it. Bipartisanship has finally come to Washington

Yes, John Kerry says the U.S. has evidence of Syria's sarin use, and I believe him

Yes, it might help distract the media from all their so-called 'scandal' coverage and the impeachment movement

Yes, the U.S. has to stop abuses like governments gassing their own people

Yes, Syria's chemical weapons likely came from Iraq while it was ruled by Saddam Hussein. The U.S. must not let them get away again

Yes, Congress should give the OK so Obama can continue making a buffoon of himself

No, U.S. military action might not even have a real effect. The regime could use the affair as propaganda to stoke anti-Western sentiment

No, there are no vital national security interests at stake in Syria

No, the U.S. had more support going into the Iraq war, and look how that turned out

No, not one drop of American soldiers' blood should be shed in Syria

No, we have enough problems here to worry about

No, we're already broke. How can we afford a war?

No, didn't we learn our lesson from Egypt and Libya?

No, we're supporting the wrong side!

No, both sides are evil – but the current regime is better than what's coming if it's overthrown

No, Americans are overwhelmingly opposed to new overseas military intervention

No, let's pick our fights intelligently. This would be a weak, ineffective, face-saving, limited bombing of Syrians to maintain our credibility

No, Obama still hasn't provided proof it was Assad who used chemical weapons

No, this Syrian misadventure threatens to put the U.S. on a very perilous collision course with Russia, China and Iran

No, this will be the beginning of World War III

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