It's certainly natural as it's part of the natural world, it's been observed that rats turn homosexual when there's no females about. But no one can say that homosexuality is 'normal' with a straight face (pun semi-intended) when there only a small percentage of the population is homosexual. If it was 50/50 then you can call it normal, as in it's the norm. Not that any of this is an excuse for discrimination. It's not
You seem to mixing up the word normal with usual.
By your logic being ginger "isn't normal", which clearly as a sentence is ridiculous even if you want to define 'normal' as being over or equally proportionally representative.
But as I said, that isn't what normal means. The opposite of normal is abnormal so are you happy to describe being homosexual as something that is 'abnormal', because that is exactly what you are saying.
It's extremely natural to humans to divided themselves along lines of difference. Race, religion, gender and sexuality since the dawn of time. homophobia is very natural as much as homosexuality is.
Sorry you defeated this line or argument with your first sentence...
'It's [homosxuality] certainly natural as it's part of the natural world'
Homophobia is NOT part of the natural world and therefore it is not natural. The same goes for racism and religious intolerance.
You are confusing the trait of territorialism and tribalism, which is seen in many other animals, with the irrational views and treatment of people based on their sexuality which certainly isn't replicated in nature.
For example, it is natural for a penguin to defend its homosexual offspring from other penguins not from their group but it is never the case that a penguin will reject it's offspring because they are gay. That is a purely human phenomenon.
In fact what isn't natural is Global acceptance and tolerance, it's been forced on the entire planet since the end of WW2 and many cultures, not just our own, have had great difficulty in adjusting. And there has been many examples of this going wrong in the last 70 years
Just LOL. What has been 'forced' on the entire planet exactly? The idea that gay people exist? Do you think that homosexuality didn't exist or was significantly less prevalent pre-1945 and the current 10% rate is due to governments somehow brainwashing people into being gay?
Furthermore your historical ignorance is staggering. In Ancient Greece, where even today we still take many of our ethics and morality from, love between two men was considered the most profound, moral and highest form of affection there could be.
It was the introduction of the Abrahamic religions that changed this. So actually the acceptance of homosexuals is not new like you suggest, it's far, far older than homophobia. And the only thing "forced" on society was homophobia via crusading nature of Christianity/Judaism/Islam over the last thousand and more years. Thankfully the enlightenment is slowly reversing this unnatural, irrational views drummed into society from the churches and temples.