As far as your alma maters go, write a letter to the alumni associations and tell them why you won't be giving them anything or maybe even hiring their grads. Mayber what you gave in the past or can ever give to them is a pittance, but every pittance helps!
When my insanely wealthy alma mater calls me asking for money I laugh at them:
“You are asking Me for money?”
Lol.
I find ways to give to good programs at the schools that do not feed into “diversity” ideologies. Like a cancer research center!!!!