Arguments that wide-scale non-white immigration is detrimental to white societies, that the black-white IQ gap includes a non-zero genetic component, that biological differences exist between men and women, etc. cannot be refuted through rationalism, so we have to resort to other methods to prevent their spread.
I think this is fairly settled science, last time I checked men do not normally have a uterus.
The misconception that Trump and his supporters are racist, sexist, bigoted is why people will never understand why Trump supporters support Trump.
And this is the primary reason why no one has been able to stop Trump yet.
You can not stop Trump if you don't understand why people support Trump.