@NJ If you can come up with a compelling and valid reason to discriminate against individuals by virtue solely of their sexual orientation, you go right ahead.
The debate is lost if you cannot come up with an objective and evidence-based reason, and I do not believe that you can, which is why we keep getting these redundant and frankly quite risible arguments about it being against god, or being an abomination, or anti-evolutionary or whatever.
Quite separately from that, you also have to take account of the fact that common cultural values will change over time, sometimes very quickly, over the span of decades only. The whole issue of equality for homosexuals is a graphic case in point. In the developed world, the argument for discrimination has been lost; the most vociferous hold-outs tend to be religious fundamentalists or evangelicals.
Nigeria is a case in point, where some quite harsh anti-gay laws have been introduced, based principally around religious values.