First of all we are required to judge and preach:
Preach the word; be instant in season, out of season; reprove, rebuke, exhort with all longsuffering and doctrine. -2 Timothy 4:2
Second, if you'll refer to the original post, all music must be of a GODly, wholesome nature. Heavy metal does not qualify as such, nor any form of rock for that matter.
Yes, JESUS did "hang out" with sinners and heathens, but only for the same reasons that any True Christian associates with sinners. He was on a mission to recruit them to True Christianity. Notice what the Bible tells us to do when people won't drop what they're doing and follow us into Glory:
And whosoever shall not receive you, nor hear your words, when ye depart out of that house or city, shake off the dust of your feet. -Matthew 10:14
In other words, have nothing to do with sinners unless you're attempting to save them!
Being gay or bisexual is obviously immoral and perverted and I do not feel the need to clarify that further considering how easy it would be for you to look
here.