#Terrorfail.

Social media giants Twitter, Google and Facebook are being sued by the families of victims of the San Bernardino terror attacks.

The lawsuit claims those companies aided ISIS by letting them build their online profile and bolster recruitment.

Fourteen people were killed in the December 2015 attacks by twisted husband-wife Islamist extremists Syed Rizwan Farook and Tashfeen Malik.

“Without defendants Twitter, Facebook and Google (YouTube), the explosive growth of IS over the last few years into the most feared terrorist group in the world would not have been possible,” the suit, filed Wednesday in Los Angeles, alleges.

“For years, Defendants have knowingly and recklessly provided the terrorist group IS with accounts to use its social networks as a tool for spreading extremist propaganda, raising funds, and attracting new recruits,” reads the complaint, filed by lawyers Keith Altman and Theida Salazar.

IN OTHER ISIS NEWS

— ISIS wants would be jihadis to use Craigslist and eBay to lure potential victims to their lairs to use as hostages, then kill them. The latest issue of the death cult’s terror bible, Rumiyah, told its disciples to go to U.S. gun shows, stock up on firepower, then kill people.

— A U.S. Navy SEAL was killed in action during fighting in Somalia by al-Qaida farm team, al-Shabab. The commando was the first U.S. service member killed in the country in nearly 25 years.

— Five people were killed in northeast Nigeria after two female suicide bombers obliterated themselves and everyone around them. The violence came a day after three other female bombers tried to attack a military outpost but were killed by soldiers.

The Boko Haram extremist group, which is an ISIS affiliate, has increasingly used girls and young women to carry out attacks on marketplaces, checkpoints and other targets.

— German authorities have arrested a 29-year-old Syrian suspected of membership in the Islamic State group. Federal prosecutors say the man was arrested Thursday in the Leipzig region.

Prosecutors claim the suspect joined a military unit of the Nusra Front in Syria, allegedly rose to become the unit’s ‘emir’ in the Raqqa region and took part in conquests of the town of Dibsi Afnan in November 2012 and the town of Tabka in February 2013.

bhunter@postmedia.com