Tolerate and get pissed if he/she ever brings their bf/gf around. But still tolerate it. He/she is my son/daughter and we're all human. If they'd made it to the age of eighteen, they'd already know my views on the subject and thus there wouldn't be any point to me voicing my opposition unless this son/daughter directly came to me and my hypothetical wife talking about getting married or whatever. In the final analysis, God is the final judge and that's that.
How about loving your child unconditionally and openly embracing their lifestyle? Attitudes like yours honestly make me sick to my stomach. And I'm saying this as someone who is an LGBTQ person with an insanely conservative fundamentalist Christian mother.
