A grieving father has sued Google, Twitter and Facebook, alleging the web giants enabled the Paris terrorist attacks that killed his daughter.

Nohemi Gonzalez, 23, was a student spending a semester in the French capital when she and 129 others were murdered by gunmen and suicide bombers aligned with ISIS. She was the only American slain in the atrocity last November.

Her father, Reynaldo Gonzalez, of El Monte, California, has now sued the trio of US companies, claiming the web giants' websites and apps were used by the terror group's masterminds to brainwash people into joining their ranks, profit from video ads, and coordinate attacks.

"Without defendants Twitter, Facebook and Google (YouTube), the explosive growth of ISIS over the last few years into the most-feared terrorist group in the world would not have been possible," the lawsuit, filed in the northern district of California on Tuesday, argued [PDF].

"This material support has been instrumental to the rise of ISIS and has enabled it to carry out numerous terrorist attacks, including the November 13, 2015, attacks in Paris where more than 125 were killed, including Nohemi Gonzalez."

The lawsuit argues that the medieval terror bastards used Twitter and Facebook and Google's YouTube channel to garner supporters and funds. It also claims Google is partially funding the terror group by sharing advertising revenue with them.

"This complaint is not about what ISIS's messages say," explained Ari Kresch, a lawyer with 1-800-LAW-FIRM representing Gonzalez. "It is about Google, Twitter, and Facebook allowing ISIS to use their social media networks for recruitment and operations."

The tech goliaths being sued have all pointed out that they are doing their best to block terrorists using their services, with Facebook commenting that in the event of "evidence of a threat of imminent harm or a terror attack, we reach out to law enforcement."

Google said that it has "clear policies prohibiting terrorist recruitment and content intending to incite violence, and quickly remove videos violating these policies when flagged by our users." It declined to comment on the specifics of the lawsuit.

Twitter has already removed thousands of accounts suspected to be linked to terrorist groups and says it currently has "teams around the world actively investigating reports of rule violations, identifying violating conduct, and working with law enforcement entities when appropriate." ®