First, are so-called 'gay rights' merely limited to 'gay marriage'? The answer to this is clearly no. Many homosexuals in the United States (I will not comment about those in other lands) are interested in gaining access to minor children,
Yes, some are, CARLy, but alas, mostly just for the incredibly dull and unsexy purpose of parenting.
As for 'gaining access' to such people for the purpose you imply (sex), lots of people want that, and it has nothing to do with whether they are straight or gay. Remember, CARL-prude, the vast majority of abuse of children is accomplished by their biological parents.
Obviously! This is like a black getting the KKK to abandon its hate, or a Jew wanting the Nazi to abandon his project of exterminating him. Of course the gay would want those hate-filled intolerants the religious to stop persecuting him.
Not particularly relevant, but the 10% sound far more realistic.
Again, this is completely irrelevant. Who cares what causes it? You might as well obsess over why some people like sweets.