Hamas, Hezbollah, the PFLP, FARC, the Communist Party of the Philippines and the Liberation Tigers of Tamil Eelam are all on the official list of terrorist organizations drawn up by the United States government. Providing support to them is a crime punishable by up to 20 years in prison.
So of course they all have Twitter accounts.
As does Ramadan Shalah, the leader of Palestinian Islamic Jihad, which is also on the list of designated terror groups. The PFLP has at least four Twitter accounts. (Both the PFLP and Jibril's Assadist splinter group are listed. And both have their own Twitter accounts.) FARC also has multiple Twitter accounts. Timochenko, the FARC's narcoterrorist boss, who was accused by the State Department of "the murder of hundreds of people who violated or interfered with the FARC's cocaine policies", is also on Twitter.