There is a difference between not wanting a nation or people to put their stamp of approval on something and executing those who do it. We never executed homosexuals in the USA, but it wasn't normalized or legal so those who practiced it kept it secret. Now with normalizing it homosexuals are insisting on being given access to our children to teach them it is "normal" and in the process are "converting" many gullible young people to enter their lifestyle. I loved my brother who was a homosexual. But I did not give him access to my children or let him bring his "partners" around them. He died at 32 years old of AIDS. He also had relationships with other men without telling them he had AIDS and infected some of them. Many homosexuals like my brother were full of anger and bitterness and hurt others because of it.
Your brother may well have been angry and bitter, but don't you think that might be in part the way he was treated by people, including members of his own family? Why would you deny your children the right to get to know their uncle? You said he was homosexual and had partners. Were any of those partners children? What danger did he present to your children? He was not a pedophile, he was a homosexual.
The worst thing he might have done as far as your children are concerned is teach them that some people are homosexuals, and that they're still valuable members of society. Your brother might have made some poor decisions, especially in terms of having multiple partners, but the fact he was homosexual isn't something he chose.
There are promiscuous people on earth, and it's not a healthy behavior. But that goes for straight and gay people alike. Homosexuality is not related to that at all. It's very sad you denied your children the right to get to know their uncle. He might have had a lot of great qualities they never got the chance to experience.