"Go to a Jewish or Muslim butcher's and ask him for a pound of pork burgers. Then sue him."
This doesn't work because Jews don't even sell that to other Jews. They just don't sell it at all.
However, I wonder just how far this bias would be tolerated if it was about raw money. For example, what about another 'mark' besides sexuality?
Play along with me and imagine that in a fictional world someone has credit and was denied business based on their credit.
If you must, replace the word 'credit' with 'sexuality' in that last sentence to help discern an opinion. So, is that discrimination or just good business?
Anyways, at least the homosexuals are fighting it in the world of sex. Maybe someone will fight the other monsters someday.