Ignoring the fact that originalism as practiced is an embarrassing judicial philosophy,

> Interracial marriage has existed for pretty much all of human history

is not the answer to the question originalism is asking. It asks whether there is a historical precedence for protecting that action as a right.

You don't need to look any farther than this very ruling! Abortion has been practiced since the beginning recorded history (and likely much longer) and books like the bible even instruct you on how to perform one. That history has no bearing on Alito or Thomas.