Here's my main point: if I notice bigotry against Christians I am 100% against it. 

What we are talking about is not bigotry, but rather Christians upset that they cannot act in intolerant ways. Your whole concept of "freedom of association" is in direct opposition to an open and free society. You don't get to open a business and then decide who may walk through the door based on your personal views.

When it comes to schools: simply talking about subjects in their entirety is not pushing ONLY one belief system. It's the exact opposite. Children are instructed on many methods of family planning. Abstinence and marriage are one of them. The fact that contraception exists is not bigotry. It's up to the parents to inform children in public school about their own personal family values.

Politically active Christians are not pushing for more tolerance and openness. They are almost always pushing to limit views and limit choices. Or make their view the defacto standard.