What’s the reason?
I do believe in the principles of Amendment 1, for the record.
I'm not sure that I understand your question. Let me take a stab at a couple of different ideas. The thread is in the Religion Forum because it deals with a religion topic. The reason for the topic is that it is a discussion of Mormon doctrine and practice which is common fare in religious discussions. If you're not interested in talking about the topic, you're free to go somewhere else and let those who are interested, talk about it.
To what part of the 1st Amendment are you referring? Why is it pertinent? You aren't setting its parts in opposition, are you? Claiming to protect "free exercise of religion" by impinging on others "freedom of speech" would be doing exactly that. Once again, I'm not quite sure what you mean by this statement.