I don't think you can divorce the religion from the actions of your parents. The church guilts them into being manipulative, controlling and bigoted people.
They can't allow their children to choose their own path, because that counts as a failure in the home. Its a reflection upon their own short-comings. They are told by the church to gently prod, give little reminders, etc. They will set rules that are based solely on their own prescribed morality, ie. No dating non-members, no drinking tea or coffee, even if that's not how YOU feel.
As far as being bigots. If they are TBM, they have to be. If you tolerate sin, ie. allow gay people to live their lives without judgement, then you are at the top of a slipper slope that leads into a pit of sin.
If the church would lighten up, the members would too. They are kept in line by constant guilt trips in Gen. Conference, judgy neighbors, and eternal threats of punishment and separation.