"I don't believe a child should be exposed to a couple of people suffering a mental disorder. Rabid Homosexuality is a disorder of nature, a product of a diseased mind."
Homosexuality, "rabid" or not, occurs throughout nature and across species thus it is, by definition, "natural."
Religion, on the other hand, actually is found only in humans and, therefor, actually could be described as unnatural. Given your apparent aversion to all behaviors that are unnatural, I believe you should not only be an atheist but you should also begin your attempts to have children removed from, or prevented from being placed with, religious parents.
"It's a sin that should be fought against, not normalized and imprinted into a child's mind as "okay"."
But that's exactly what it is, as I just pointed out: a perfectly normal state for a certain percentage of a given population in quite a few species.
"(Mind you, I don't speak of individuals who possess this temptation who are actively fighting against it)."
Those are the dangerous ones you should be talking about. Repression of one's sexual identity isn't a good thing and can lead to all sorts of problems.
"It's a corruption of the mental processes."
Ah, so you have the research to back this up do you? Because the APA hasn't had it listed as a mental illness for thirty years or more because they actually did research it and found the idea to be fucking wrong.
"Then again, most liberal straight people are suffering from various disorders themselves."
Yes, all that toleration for people different than us along with wanting to ensure that everyone is treated fairly and equally are obviously signs of severe mental disturbance.