It took six years of legal battles and public outcry here.
It also took six years of legal battles for a Florida couple to win the right to grow vegetables in their front yard...so, yeah. It could easily take several generations for any real positive change to occur.
But it will...Trump is a setback but, barring nuclear war or global climate catastrophe, he is a setback we can overcome. He is, in fact, a setback we should be able to capitalize on.