There is no connection. I'm not trying to imply a connection. The only connection is that they are both things possibly implied by the word "racism".
I'm trying to say that when I say "I oppose racism", intending to signal "I oppose people beating up minorities", and people misunderstand badly enough that they think I mean "I oppose IQ-by-race studies", it disturbs me. If people know that "I oppose racism" could mean "I oppose genocide", but choose to interpret it as "I oppose IQ-by-race studies", that worries me. Those things are completely different and if you think that I'm more likely to oppose IQ-by-race studies than I am to oppose genocide, or if you think IQ-by-race studies are more important and worthy of being upset about than genocide, something has gone very wrong here.
A sentence like "I oppose racism" could mean a lot of different things. It could mean "I think genocide is wrong", "I think lynchings are wrong", "I think people choosing white people for jobs over black people with equivalent qualifications is wrong", or "I think IQ by race studies should be banned". Automatically leaping to the last one and getting very angry about it is... kind of weird, because it's the one I'm least likely to mean, and the only one we actually disagree about. You seriously want to reply to "I oppose racism" with "but IQ by race studies are valid Bayesian inference!" and not "yes, I agree that lynching people is very wrong"? Why? Are IQ by race studies more important to your values than eliminating genocide and lynchings? Do you genuinely think that I am more likely to oppose IQ-by-race studies than I am to oppose lynchings? The answer to neither of those questions should be yes.
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A note for theists: you will find the Less Wrong community to be predominantly atheist, though not completely so, and most of us are genuinely respectful of religious people who keep the usual community norms. It's worth saying that we might think religion is off-topic in some places where you think it's on-topic, so be thoughtful about where and how you start explicitly talking about it; some of us are happy to talk about religion, some of us aren't interested. Bear in mind that many of us really, truly have given full consideration to theistic claims and found them to be false, so starting with the most common arguments is pretty likely just to annoy people. Anyhow, it's absolutely OK to mention that you're religious in your welcome post and to invite a discussion there.
A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Once a post gets over 500 comments, the site stops showing them all by default. If this post has 500 comments and you have 20 karma, please do start the next welcome post; a new post is a good perennial way to encourage newcomers and lurkers to introduce themselves. (Step-by-step, foolproof instructions here; takes <180seconds.)
If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post.
Finally, a big thank you to everyone that helped write this post via its predecessors!