I think living with transphobic parents is worse because at least the stuff that racist parents say, racist parents know the stuff they're saying is dumb. All props to racist parents.
Transphobic parents will immediately ignore or even cut off their kids for even daring to transition, fearing that they will "cut their genitals off". (My family is like this.) That the standard in society is a straight, masculine, Christian man. "Christian"? How Christian is that type of behavior. They create extra trauma and make all of their kids think they're dumb.
But racist parents are relatively smart.
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