You do business with the people that will bring you a profit. In theory, it doesn't matter what personal views the person across the table has if they adequately provide the services you need. Learn to identify the wants/needs of those people that operate around you and plan accordingly.

Business is about profit, not feeling good about the people you buy/sell services from/to.

Defend yourself if you see a need. Don't avoid people just because you don't get a warm feeling when you exchange services with them.