It takes an enlightened parent to see things the way you do, most parents consider themselves as a figure responsible for dictating the fate of their children which includes matters of religion.
On matters of homosexuality, it might look like a widely accepted norms in today's world but we Africans still have our beliefs and perspective about the whole concept.
I have observed that when parents are too autocratic about fate of their children, it mostly doesn't end well. If you look critically, there were loopholes in proper guidance during childhood.
African way of life is in variant with the strange way of life called LGBT. It's a pill that we may not swallow anytime soon.