The point is you don't excoriate all blacks because they have a high murder rate and you don't excoriate all homosexuals because of their diesease rate.A black skin, being a passive non-behavioral characteristic, does not and cannot predispose its possessor to commit murder.
A homosexual drive, being an behavioral characteristic that seeks actively to express itself, predisposes its possessor to enage in filthy, grossly dysfunctional acts that tend to spread vile STDs.
The construct of the analogy is not dependent on similarities between blacks and homosexuals in the cause or type of behavior. You can continue to list differences, they are nor basic to the point involved. You do remember the point. People have rights and responsibilities as individuals and are not denied them because of the behavior of others in the group. As a conservative, I'm sure you recognise this basic american prinicple.