If you take a sola scriptura view and then read it through a lens that's been cultivated over years to reinforce patriarchy and supremacy (see e.g. Manifest Destiny, the curse of Ham, etc) then you will end up absorbing the genocidal and supremacist bits and not the hospitable and altruistic bits.

Agreed, over the years I've come to firmly believe the root cause of all the Christian extremism we have nowadays is the literal interpretation of the scripture by Evangelicals. When you take every word of that book as law and you refuse to acknowledge some of it shouldn't be relevant anymore, you end with some really absurd worldviews and beliefs. Especially in those small churches without affiliation to some larger religious body, without some authority dictating what is acceptable and what isn't, the insanity runs amok.

This is something I admire in the Catholic church, their willingness to reinterpret the Bible to current circumstances, they get a lot of flak (deservedly so) for some things, but at least they have that going for them.