The few assembled on this forum are proof enough that Roman Catholics and Protestants and Mormons and JW's will never agree on certain points of doctrine. In fact within each denomination, you will also find disagreement.
This comes as no surprise since we are all still pretty messed up people. A large percentage of confessing 'christians' still suffer the same troubles as non christians as we play out our own little dramas we think important.
Now the question "how much wrong doctrine, dogma etc. must we embrace to lose our salvation"? In fact, can we lose our salvation by embracing wrong doctrine or do we just put ourselves in danger of never seeing the full life Christ has provided manifesting in our lives?
Will we ever see 'His kingdom come and His will being done' or will we just play our pitiful little parts on this stage and never see what could have been?