I certainly cannot speak for the good Christian Captain, but will offer the following:

Such education will lead to a return of a strong social stigma against homosexuality. In the good old days, homosexuals remained in the closet, away from our children, for fear of many possible repercussions including:

1. Social ostrification, condemnation, ridicule, and isolation
2. Loss of employment
3. Removal from family orientated neighborhoods
3. Refusal of services
4. Monetary fines
5. Incarceration
6. Fear of potential physical harm

Once the homosexuals are crammed back into the closet, normal folks will be able to raise children with a clear definition of the sinfullness of homosexuality, free of any conflicting outside influences. It is the conflicting outside influences, contradicting True Christian (tm) teachings, that are the source of the attacks on a True Christian (tm) lifestyle, the War on Christianity if you will.

It is therefore plainly clear that the homosexual agenda "prohibits (or interfers with) the free exercise of religion" as garanteed in the first amendment. My free excercise requires the teaching of homosexual sinfullness, the agenda interfers with this. (Not allowing me to enter you home to proselytize and convert also interfers, but one battle at a time.)