there is no force involved. You don't have to sell your home to someone you don't want. please show me a law in any Western nation that demands that you must sell property to a specific race of people. I can wait.
1.-Of course trades must be regulated by the law. "Free world"? Regulations prevent injustice and frauds. Imagine the disaster it would be if trades weren't regulated.
2.-You aren't forced to rent/sell a house to a black guy if you don't want to.