Well, to each his own, but personally I don't care what beliefs a trade counterparty holds as long as they don't lead me to think that the person can't be trusted. Being homophobic/racist/sexist shouldn't be a problem on a forum like this, since people generally don't know enough about each other to be prejudiced. And someone can be prejudiced against a group of people and still carry out an honest deal with someone in that group, too. It happens all the time in the real world.
I wouldn't neg someone for it, but someone holding absurdly irrational beliefs (like one race being inferior to another) for me would seem less trustworthy to do business with. It doesn't matter if they
know someone's race/ethnicity/gender etc, their absurd beliefs are not based on facts or knowledge anyway.
Too often we see ethnic/racist/sexist/etc slurs used as "arguments" in disputes (for example see the recent drama with Koil) to think that prejudice here doesn't affect business.