I'll take a poke.
I get the idea, but, really, it should go. For one, making a race actually less intelligent than baseline has all sorts of connotations. There's a pretty high squick factor on this one, so, maybe it should go the way of female strength limitations. Particularly in light of 5e where no other race actually has a penalty.
I'm not a culture sensitivity expert, but, I don't think this one's really a problem. Very low squick factor.
These two kind of get lumped together. "Raiding" species is a pretty high squick factor. I mean, it's pretty one dimensional. Can orcs be raiders? Sure, no problem. Should orcs be depicted as ONLY raiders - well, that's pretty lazy and poor writing.
Being tribal isn't a negative thing. Doesn't really carry any negative connotations on its own. Again, depends on how it's presented, but, the squick factor isn't terribly high here.
I don't think anyone sees being strong as a negative.
Again, this kinda links into the raider thing. If all orcs are presented as evil, it's pretty one dimensional and ramps up the squick factor a LOT. Let's get some positive images in there as well. Round it out. Bring some more to the table.
I don't think they all have to go. I honestly don't think anyone is advocating that. Just present orcs and other humanoids in a more rounded manner, give them more than the one dimensional "Urg, we evil and have "kill me" sign hovering over our heads" and I think you go a long way to resolving this.