Mormons are not at all tolerant. Just because they aren’t calling for the death of LGBT people, and are still willing to take their tithes, doesn’t make them tolerant.
You are conflating tolerance with approval. There's a spectrum of attitudes one might have towards any particular group of people. Here they are with most friendly on the left and most unfriendly on the right:
Kinship -- Friendship -- Approval -- Tolerance -- Disapproval -- Distrust -- Fear -- Hatred
Tolerance is the acceptance or putting up with something that one doesn't approve of. Institutionally (and broadly among individuals) the Church of Jesus Christ of Latter-day Saints is tolerant of LGBT people, but it doesn't not approve of LGBT lifestyles. It sounds like you want more than tolerance. In a pluralistic society, I don't think that is a reasonable position to take.