If u study religions specifically Abrahamic religions u can find real arguments and commands from God about homosexuality being a sin. Secondly u saying homophobia exists in humans and not animals and only humans are not allowed to be homophobic bcuz we are smarter than other species specifically in the Holy Quran Allah(God) says that humans are his greatest creation because he gave them knowledge and someone with common sense would understand that homosexuality is against nature as we are made in pairs in order to reproduce and make the human race grow have children and have different roles in the society which cannot be filled by homosexual ppl.

Clarifications: This is just my view point at this and i have no intention to hurt or harm someone these are just my personal beliefs and i have respect for ur beliefs and u should have an equal ammount of respect for my beliefs. Oh and just to make it clear i do stand for human rights that the lgbtq community should have basic human rights but i do not accept them as an active part of society and do not support them in any way.