Are you really arguing that the idea of LGBT being acceptable should be wiped from the world? Even I don't do that; I simply argue that homosexuality oughtn't to be regarded as equal to heterosexual marriage.
And yet you can't provide a single cogent, coherent, rational reason for this stance.
If there was one, you and your kind would have provided it long ago. As it is, there isn't one.
The good news is that an ever-increasing number of places in the world
do treat marriage as an equal matter between heterosexual or homosexual couples, there being every reason to do so and no reason to do otherwise.
The dominoes of anti-gay prejudice are a-falling one by one; your side is losing (cohort replacement, it's called), and there's not a damned thing that you can do about it. When it comes to progressive measures that make people's lives better by offering them more choice and extending their rights, it's safe to say that time and the younger generations are on the right side. Younger people have less time to become ossified by - or indeed enslaved by - unthinking adherence to tradition for the sake of it and are more open-minded.
Currently, the number of Christians is at worst static, and probably growing.
In the First World that's not what the figures say.
The FACT that it is shrinking in the West could indicate that the West is growing out of a sense of spiritual being, or that it is losing touch with reality.
Or that more people know bullshit when they see it.
Or that the material conditions - poor, deprived ones - which are the natural soil for pious, hopeful beliefs about another, better plane of reality without hunger, sickness and want are generally improving.