Disinviting this man is just wrong.  Lesbians and gay men are God's children, too.  It's so prejudicial  Please think about this...as humans we have a total of 4 blood types or  6 if you count whether you are RH negative or RH
positive.  I feel as if anyone, no matter what color their skin is or their blood type  or sexual orientation is, I wager none of us would reject a blood transfusion from any of these people if you needed a transfusion to survive.  Think about it...