because it threatens their religious belief in equality. the government will blacklist you from ever getting a grant in future. no scientific paper will ever publish your research. no one will hire you. it's an effective system for silencing ideas that threaten the way our rulers want us to live. once you realize the races are not equal, it just leads to more conclusions that our rulers don't want us making. better to just nip the idea in the bud, and prevent any new research from happening.
United States