Is there a way to get my mother and her boyfriend to accept me on my religious standpoints?

[Spades]

I posted this in another section and before anyone accuses me of trolling, I'm not. I just want my mother to accept me that way I'm not constantly in trouble.

After I posted some Atheist like stuff on Facebook, since then I could tell my mom has been mad at me. Shortly there after, she started trying to say grace at the table (something we'd never done in the past) and we took a turn each night. I personally find Christianity annoying and something I don't want shoved in my face, so when she forced me to say grace, I spouted out "Dear Flying Spaghetti monster..." Then my moms boyfriend proceeded in cussing me out and sending me upstairs without dinner. I'm currently grounded and my moms boyfriend is threatening me.

I don't know how I can get them to accept me at this point. Even after I made it clear about my political standpoints my moms boyfriend threw insults at me. Is there some steps I have to take? I really want to play my guitar right now but I'm grounded.
Firefly- I told them I didn't want to do it but they forced me anyway and I refuse to do something I don't believe in. So I talked about the FSM, what else was their to do? Submit?
Togolot- Why should I have to contain my opinions? Is that really fair? Come now.

[ProfGene.Togolot]

You should learn to keep controversial points of view t yourself and you won't get in trouble making fun of saying grace is just as bad as someone forcing their religion upon you. Its okay to hold your points of view but don't antagonize others with them and don't post things like that on Facebook. As long as you are living with your mom try not to make waves. Try to get along and not argue things like religion or politics as those arguments lead to nowhere but trouble.

[Firefly Flame]

They shouldn't force their religious or political beliefs on you, but you also have to understand how very much your viewpoint hurts them. They think there is an all-powerful magical being that protects them and this is part of what gives them strength and gives their life meaning. When you poke holes in that, you are forcing them to face a very scary world alone (no magic daddy or mommy in the sky) and the idea that you might go to hell, which they believe is real. You're probably not going to get them to accept your viewpoint, because it runs counter to their upbringing, traditions, hopes, beliefs, culture and values. At best, they might someday accept that you're not a religious person, but that's probably all you're going to get. Ever see a little kid with a pacifier, security blanket or teddy bear? When you try to take it away, they freak out. So, if you want your parents to settle down, you're going to have to stop trying to take away their teddy bear, ok? On Facebook, change your privacy settings so they don't see your atheist posts. At home, don't be disrespectful during grace. Just decline. "No, I'd rather not offend anyone." Or say something thankful. "I'm grateful to mom for working so hard to make dinner." You don't have to be an ****** about it. You have to live with these people, at least until you grow up and move out. Be the mature one, and let them be the immature ones. It's not forever.