Speaking completely out of my ass, so excuse if my facts are wrong, but no.
All of those things can also be attributed to the struggle for power in society. If a group has power, they will become conservative in order to preserve it. See the Democratic party right after the Reconstruction Era.
The use of racism also doesn't have any linkage to being conservative either. It just so happened that the old whites in the South attained power through slavery and have sadly gotten the term "racist" slapped along side them because they were conservative. No way in hell they were going to abolish slavery and become progressive because their power came from plantation owners having slaves.
Also, Hitler used "racism" (not really being Jewish isn't a race) in order to get the Nazi party to the forefront of German politics. It was a tactic to arouse German nationalism, and made most Germans "racist". They weren't dumb either as German scientists made the first jet plane and one scientific breakthrough I cannot remember right now, and probably a whole bunch of other stuff I don't know. So did those scientists have low IQ? Probably not if they discovered all of that. But if they did, then that IQ test surely has a new definition for "intelligence".
Low IQ - well that's just dumb lol.
tl;dr history says no, so no.