I don't practice moral relativism, and that is likely outside the scope of this discussion.

My point is, it's not just a difference of opinion when a group of people promote racist, neo-Nazi views (alt-right), or peddle in conspiracy theories (Qanon).

Are we just going to ignore the significant presence of these groups on Twitter?

There's a reason why people are blocking and it's not merely disagreement. One side treats the other differently but not for the reasons being presented.