I think intersectional feminism is intended to be less racist, classist, etc.
If you start with that then you have a no '-ism' policy, and everything's a safe space so to speak.
But obviously you include transwomen.
On the other hand if are gender-critical then you are automatically going to attract people who don't necessarily employ the same general standards of inclusion, privilege-questioning, and so on.
So really you're NOT going to eliminate racism and classism and so on (overt or perceived), because some subset of the people who agree with you, on say, gender-critical feminism are going to be say, right-wing Christians.
So either you include these 'unsound' people within a specific context where their problematic attitudes are not relevant (if you have a campaign for, say, sanitary products, you don't need to consider people's views on other topics). Or you go for a purity test and deplatform people.
I don't think the latter approach is a winner, personally. Both political parties include individuals who might be a bit dubious. But it's a grand coalition to fulfill the overriding goals of the party.