The US messed up most of Latin America. USAID makes things better. Removing USAID makes things worse. It doesn't matter whether it is out of benevolence (the real reason is that making Latin America better means the US doesn't have to deal with a migrant crisis). What matters is that it's better than the alternative.

They don't do it for benevolence. They do it for the soft power that appearing benevolent gives them. Fucked up motives but still a net positive.

technically second world, but anything not white is third world to you people

Then maybe you shouldn't keep using that language. You're the one that introduced it during your first comment