That's textbook discrimination, both age and gender. The reason it's allowed is because the scouts are private organizations. Remember, discrimination as governed by due process under the 5th amendment applies to the federal government, and equal protection under the 14th amendment applies to the states. As most everyone is aware to some degree or another, there's an enormous body of constitutional law on the subject, particularly about what discrimination is, and *when* and by whom discrimination based on race, gender, and sexual orientation is allowed.
So, I guess that means that I'm not going to get to be a girl scout and homosexuals are going to have to get used to not being invited in as ministers in some churches?
I guess I can live with that.
If the reason one doesn't "like" the policies of an organization is because the organization treats them differently or excludes them, that is discrimination.
This is all to say that it's very fair to make the original argument that the bible's view of homosexuality as a sin "has been used" as the basis of and has supported discrimination against homosexuality. It happens whenever anyone or any organization practices discriminatory actions and cites the bible (rightly or wrongly, depending on your interpretation) as support for that position. I'm sure other religious and natural principles are used as well, but when it does happen, let's be honest and call a spade a spade.
Well, I think one will find that most/many churches wouldn't have a minister who makes a habit of adultery, theft or a host of other "sins" either.