BLM, LGBTQ and the vaccine are not fundamental to anything for this couple.
They're a straight white couple.
Unless he's an outright homophobe or an actual racist (not just live and let live), none of these issues could possibly affect their lives.
Again, not fundamental to anyone involved.
No one has presented any reason to say that he hates homosexuals or black people.
He just doesn't want to be involved in the insane politics.
That's actually a healthy position since these aren't fundamental issues for him.
So, he dodge a bullet because she values popularity and looking good over being a good spouse and partner.
She knew all of these things especially his ambivalence before choosing him and then she stabbed him in the heart on the day of. He will look back and thank her.