There seems to be this meme that white people are not aware of other cultures and are blinded to the realities of the world because they are rich and coddled and so on. It seems to be fashionable to point this out at any possible opportunity.

My impression is that in this particular community, emphasizing multiculturalism without some obvious instrumental benefit is if anything an anti-applause-light.

my concern is that promoting multiculturalism has the danger of backlash i.e. by encouring too much tolerance of other cultures, you alienate a large fraction of people (this goes back to your 'community problems' point). I've been seeing this go on over the past decade in the West.

I'd like to echo John Maxwell IV in asking for examples. Specifically if there's a way you see EA becoming more humanistically aware in a way that is instrumentally useful to the object-level goal of doing good, but harmful to the meta-goal of growing the movement because it alienates a large fraction of their potential audience (and this is worse than their increased capacity to do good). I can't come up with things that seem plausible to me, though this may be my brain being silly again.