A racist Donald Trump fan has been arrested by the FBI after he made threats to kill President Obama. The authorities also found that he had a cache of pipe bombs on his property when they raided his home in Oregon.John Martin Roos, a 61-year-old from Oregon, has been charged with communication of a threat in interstate commerce, and additional charges are likely forthcoming. Roos first came onto the federal government s radar after a  concerned citizen  brought Roos  Facebook and Twitter postings to the FBI s attention in February, according to an affidavit from Special Agent Jeffrey Gray.Roos also had a series of Facebook and Twitter posts with racist rants targeting the President. Obama you goat fffing fudgepacker, the refugees are men of fighting age. Black lives matter! Sure we need someone to pick cotton and wash cars. Paris, burn diseased muslim neighborhoods to the ground and start over with human beings. Obama you are on a hit list,  he wrote in a post that appears to have been removed.He is just the latest in a line of people, ranging from the truly dangerous to just out and out cranks, that have been apprehended since Obama s inauguration in 2009 for threats towards the first black president.His postings online definitely took cues from the targets of Donald Trump s ire. The Huffington Post reported that Roos used his online postings to attack  Attorney General Loretta Lynch, singer Beyonce, Fox News anchor Megyn Kelly and reporter Michelle Fields.  Roos also had praise for those who have supported Trump or been praised by the reality TV star:He praised Ann Coulter and Stacey Dash, and posted several links to posts on Breitbart.com.Coulter has identified herself as a Trump supporter, while on Fox News, Dash has defended and promoted Trump.Breitbart.com has been the most pro-Trump of the conservative media outlets, and an insider has actually alleged that Trump has been paying the site for favorable coverage.Featured image via Facebook