I agree with @wundayatta. This is not worth getting mad at your parents over. It’s a talking issue. Ask them why they don’t want you to go. “Because I said so” is not a real reason. Spend some time think about their reasons, and then communicate why you would like to go.
I have been on both sides of this situation. As a teen, my mother refused to drive me to a football game in October because I wanted to wear a coat, and we had just spent money on some new clothes for me, including the very cute outfit I bought to wear to the game. So I went without wearing a coat, the weather dropped to 20 degrees, and as this was before cell phones, I had to wait until she picked me up. I was sick for days, and she told me it was my own fault.
On the other side, my children attended Catholic grade school, and then transferred to a public school where a lot of the kids went to one particular Christian megachurch. My youngest daughter had a hard time, because the kids told her the wasn’t Christian and would go to hell. She begged me to take her to the church, so she and I both went, and I sent her to summer church camp. At camp, the youth minister called and asked if she could be baptized, as lot of kids were being saved, and my daughter indicated that she wanted to be too. I talked to her and told her as a Catholic, she had already been baptized, and that I would prefer we talk about it before she did it, and that if she still wanted to do it, she could, at the church. When she came home, we talked about it, and decided it would be okay, so I called the church youth minister, said it would be fine, and made arrangements to have her baptized at an upcoming youth group meeting.
The youth group meeting turned out to be at someone’s home, where there was a pool party for the kids and they were going to baptize her in the swimming pool in the middle of the pool party. We put a lot of thought into the decision, and the minister seemed puzzled that we wanted to stay, and when I commented that we took the decision about the baptism seriously, and that doing the ceremony in the middle of a swim party seemed sacrilegious, he made the comment, “Oh at this age, they don’t know what it’s all about, and don’t know what to think about God. We get hold of them and tell them what and how to think.”
Now, to me, that statement was really contrary to how I personally feel about thinking about religion, and is insulting to my child, because he was in essence telling me that the church’s position was that all middle schoolers were mindless sheep, in need of programming. We left, and did not go back.
My point is telling this is that, depending on the church that you want to attend, your parents may have a fundamental problem with either the idea of organized religion in general, or they may have a problem with the particular church that you would like to attend. But you need to talk to them about it without getting angry, and think about it in terms of what is right with their reasoning, and what is wrong with their reasoning. The part that is causing the anger is because it feels like control, and you sound old enough to get more of a reason than just NO for something that doesn’t involve danger or spending your parent’s money. Conversely, by being old enough to deserve more than just a NO, you need to give their opinions and reasoning thought and consideration. You don’t have to agree with it, but think about it.
While you live in your parent’s house, they may be able to put limitations on your actions, but they cannot really control how you think, and if you feel drawn towards a certain religion for valid reasons, that is entirely your choice. You have a right to choose for yourself, and with that right comes the responsibility to choose wisely and with deliberation, in your own best interests.
Sorry this is so long.