Are Lds saved either way?

That's my question. I mean they say all we have to do is believe in Christ. Which I do. I don't believe in the Trinity, but I believe in Christ. The same as they do. So why do they spend so much time badgering me to leave the LDS church because of it's "falsehoods", when I'm already "saved"???? According to most of them, it doesn't matter which denomination you belong to as long as you believe in Christ. And like I said, I believe in Christ. So why do they care so much if I am Mormon?????