Isn't the base argument is tolerance/inclusivity good, intolerance bad. (Intolerance like inciting violence, suppressing criticism, homophobia, xenophobia, bigotry, the usual.) And simply taking steps that make make the world better according to this base argument is also good?

This of course can become slippery and slope-y eventually, if a propaganda machine takes over as the tolerance authority, but I don't think that's a real problem compared to what the other problems the argument is trying to address.