the biggest challenge we see is avoiding us/them framing, which is one of those things that it's easy to accidentally uphold while trying to oppose it.
"us" can be as bad as "them"; if we're drawing an impermeable line around ourselves and saying "not you" to people outside it, we should expect that we're not actually grappling with the existing fracture lines in society. we should expect that anyone trying to raise concerns about racism or classism or ableism will find themselves on the outside of that line, and the oppression will continue without proper discussion.
that's bad. that's not the goal.