> This means people should be allowed to say that different races have different IQs, that it's not ok to be gay, and that gender differences stem from biologically hardwired tendencies.
Why should people be allowed to loudly assert unsupported claims in an institution devoted to learning?
They should, because there are many things that we don't have sufficient evidence to prove or disprove, and sometimes it's useful to hold an opinion on them anyway.
If a person can make the unsupported claim that gender differences do not stem from biologically hardwired tendencies, then a person should be able the unsupported claim that gender differences do stem from biologically hardwired tendencies.
Also, not being able to make "unsupported" claims is a vicious cycle. If you can't say X, then any academic study is going to phrase their conclusions very careful regarding X (or possible selectively publish - I've seen this). And then X is going to be "unsupported".
Why should people be allowed to loudly assert unsupported claims in an institution devoted to learning?