He is not very far at all from being main stream right wing
https://www.splcenter.org/hatewatch/2018/10/28/analyzing-terrorists-social-media-manifesto-pittsburgh-synagogue-shooters-posts-gabBut Bowers targeted Tree of Life because of a deeper conspiratorial worldview that cast Jews as the most urgent threat to the white race. In his last Gab post and several others, as well as in his statements to authorities after being apprehended, it’s clear Bowers adheres to the antisemitic conspiracy called “white genocide.”
White genocide holds that forces — principally Jewish, often coded as “globalist” — are pursuing policies seeking to destroy the “white race” in their “traditional homelands” like Europe and the United States through the deliberate importation of non-white people. This is what the torch-bearing white supremacists who marched on the campus of the University of Virginia meant when they chanted “Jews will not replace us.”