Wow, still nothing. No one can show where a Bible says to discriminate against gays and sinners huh? Weird. Are you guys sure that that's part of Christianity then?
The Bible teaches us to try not to sin, and not to put ourselves in situations where we have a greater chance of sinning.
Like a Christian prone to drinking going to a bar, not a good idea.
It doesn't say to discriminate against anyone, it says to love the sinner, and hate the sin. However, that doesn't mean to revel in someone else's sin, and help them to celebrate the sin.
Why should a Christian caterer, be forced to cater a party, that the owner wants to serve alcohol at? If the caterer does not believe that people should drink?