The man who killed black teen Trayvon Martin during a scuffle in Florida in 2012 claimed President Barack Obama has two things in common with the Oregon shooter: they are both of mixed race and both have killed Christians in the U.S.

On Twitter, where Zimmerman does his attacking these days, the acquitted killer tweeted: "2 things P.O.S. Obama & his son have in common, self proclaimed "mixed race" and attacking Christians on US soil." Zimmerman included a picture of suspected Oregon shooter Christopher Harper Mercer, who identifies as mixed race.

Zimmerman based his claim upon Mercer killing Christians on an apocryphal story told to a woman by her grandmother who claimed to be on the scene and said Mercer asked students their religion before shooting them. Earlier reports only stated that he asked their religion, but said nothing about Christianity being mentioned.

Zimmerman's reference to Obama's son was based upon a comment the president made saying Trayvon Martin could have been his himself  "35 years ago" or his son.

Last week, Zimmerman retweeted a photo of Martin's dead body after an admirer called him a "one man army."

See Zimmerman's tweet below: