Probably Photoshopped, but there is no denying Obama was raised as a young Muslim. However, he converted to Christianity, and has never had any associations or indications of being an Islamic Manchurian Candidate. Trump, on the other hand, has lots of evidence linking him with the Russians.
As far as White Nationalism goes, Trump has clearly supported it, and your comparison between the Florida gay nightclub shooting and the NZ shooter is absurd.
The NZ shooter directly compliments and refers to Trump in his manifesto. Trump has been a gift to the nationalists, Neo-Nazis, and haters. His thinly veiled "approvals" and often direct rhetoric support and encourage White Nationalist behaviors. Trump even says he himself is a nationalist, although he probably doesn't fully understand the implications of the term.
Sorry you can't acknowledge the obvious distinctions.