Of course it impacts the discussion, but people trying to get others to accept the fact that homosexual inclination is a naturally occurring part of human life, is not the same thing as pushing otherwise heterosexual people to "Change sides". And if anyone gets persuaded by simple words, they were never really straight to begin with, and they probably always knew it, whether or not you did.
Homosexuality IS normal, whether you like it or not. Heck, I sure as hell hope it is normal, because there a lot more gay men out there than wierdos like me. People have always been born gay, they continue to be born gay, and short of rather radical changes to the way humans grow and develop, there will always be people who are born gay. To deny this, to marginalize them, to restrict their rights, is both pointless and cruel to the point that I must question the ethics of anyone involved in such evil.
Let me put it this way, what if the situation were reversed? What if you were told from birth that you could never be with the woman you loved? Could never touch her, never even look at her as more than a friend. What if you were ostracized, beaten, or even lynched as a result of holding a girl's hand? What if you found yourself in a situation where your only reasonable hope for having a marriage was with a man, because that was the only thing that society for religious reasons would ever accept. Horrified yet? Then maybe you have some idea of just what the position you espouse has done and is continuing to do to innocent human beings all across the world.
Here is my challenge for you. Without referencing religious beliefs or works, come up with an ethical, practical, or moral argument against a loving homosexual relationship that I cannot refute.