It's easy to see why they feel that way. Imagine an Affirmative Action style of law was passed to prioritize felons to get jobs. Non-felons (who have ALL the advantages) would suddenly find themselves occasionally losing a job a person who is different for genuinely wrong reasons. "I didn't get the accounting job because someone who did time for 3 counts of Wire Fraud applied and got preferential treatment". If that were me, I'd be pissed. In fact, I'd feel a little bit oppressed. I mean, same direction but hitting your later points. What if a law came out protecting people on the sexual predator registry against being discussed or discriminated against? I think you and I could agree to riot in the streets, no? Even though it be protecting a minority from the majority.

As wrong as their mindset is, they think Christianity is the one and only "right thing" wrt religion. So despite being the majority, if someone gets any protection from them for being "wrong", they feel as oppressed as you might feel if you couldn't stop a child predator across from the town's elementary school.. Now you and I know that there's no foundation for Christians to say all other religions are wrong and theirs correct, but Christians who feel that way don't.

Again, it might not help to understand why there's some logic to their complaints, but it's context and knowing our "enemy" can be valuable..