Right, I clearly also enjoy the literature. All I'm saying is, there's not much in HPL that isn't touched by his unfortunate views on race. I agree there are other themes, though the core theme of alienation and otherness that his works evoke seems rather tied to the racial beliefs, or they appear to arise at least from a common sense of insecurity. Honestly, the primary impression I get from Lovecraft is that the man was extremely insecure! He was clearly not fully capable of functioning independently in the world. To be blunt he was a very weird and fundamentally alienated person. Probably one of the things that attracted me to his writing is an identification with that element. I'd not disagree that part of the reason he may have expressed it in the terms he did, as racism, is probably rooted in the environment where he grew up. This would also tend to help account for the very commonness of his sentiments. His affectation of a set of opinions which seems to identify him with a local cultural elite works here too, his attitudes align him with (at least in his mind, if not actually) with the upper echelons of Boston society of his time.
Did he evolve? Gosh there are some pretty vile quotes from letters he wrote in at least the late 20's. Perhaps he mellowed out some? I don't know, but his later mythos stories seem as bigoted as the earlier ones, so its hard to say in what way that is. Generously the way you interpret Lovecraft IMHO is that he just saw a monstrous reality EVERYWHERE around him, and attributed its horror to a range of causes, of which racial degeneracy was a very easy one. I mean, he's also got a bad opinion of every remote part of the Earth. Heck, as far as I can tell from biographical reading he really was virtually unable to leave his own residence, certainly not for an extended period of time. It appears he ONCE went to New York City for a fairly short period and then abandoned his wife, permanently, so he could run home. So, perhaps we can be less hard on the guy than on nasty self-serving racists who's views seem largely to have been held because it gave them access to power. Thus, yes, in a way I feel sorry for the guy, but he was still a bigot, and that's still on him.