Looks like Robert Bower, the Pittsburg synagogue shooter, was critical of Trump, saying that βTrump is a globalist, not a nationalist,β and βThere is no #MAGA as long as there is a [Jewish] infestation.β
He reminds me very much of Anders Behring Breivik (the Norwegian terrorist and right wing conspiracy theorist), who had initially joined the Progress Party (populist right wing political party) but left it because it wasn't right wing enough for him.