"So Parents can do nothing to counter the pro-homosexual propaganda that could be injuring their child at a very vulnerable time in their development?" --- First of all, if you believe in something called "pro-homosexual propaganda" then you are not rational to begin with. But, parents can do whatever they want to counter what you perceive to be propaganda - I agreed with that...twice. If your child is having a hard time deciding whether or not they are gay and they are in their teens - they are gay. Straight children have no such "decision" problem.
"What if an underage teen does research on cancer treatments, and decides they want to go natural. Is it abuse to let them seek natural if conventional doctors think that's abusive?" --- That is an appeal to emotion, first of all. If the child is underage, why are they doing the research and not the parents? The parents in your scenario are horrible parents.
"If the teen wants to seek help from unwanted sexual attractions, this bill denies them that right." - No, this puts the onus on the parents. As I said, a couple times, if the child is a minor parents should not turn over their mental state to a witch doctor. They should "fix" the child themselves. Which, of course, will just end in a gay kid hating their parents. The only reason a teen would think they have "unwanted" sexual attractions is if adults are forcing that into them.
"Anyone who says homosexual activity is a desirable activity they want their child to grow into is insane." ---- As I started....A child doesn't "grow into" homosexuality. They are born that way. Just because you are adverse to "homosexual activity", or translated, gay boys having sex, (not girls of course), doesn't mean it isn't "desirable" to the teenage boy.
"In the beginning of a change the patriot is a scarce man, and brave, and hated and scorned. When his cause succeeds, the timid join him, for then it costs nothing to be a patriot."--Mark Twain