All available information does indeed suggest that he is a leftist and a Muslim. Moreover, we can be confident that the media would dispell these claims if they were myths. Silence is their preferred reaction to narrative-confounding variables in these vases.

That being said, fearing Muslims in the USA is like fearing snapping turtles. It's not impossible for a snapping turtle to be a threat to you, but there are a million+1 things that are more worthy of your fear.