I think the tribalism thing you mention is more inherent self interest than actual stupidity. "If other people somewhere else are worse off, who cares as long as they are making your shoes and smartphones" type of deal.
Yes, but generally an economic welfare is derived from exploiting other countries in one way or another. If you aren't willing to act on such moral depravity, someone else will be and outcompete you. People are able to justify anything to themselves morally, so the "I got mine" attitude makes sense to any sociopath out there.
But their countries are only poor because of the imperialism of rich countries for centuries. You're saying they should be grateful for rich economies helping them develop, when those rich economies are the reason they are poorer to begin with.