It always amazes me how willing people are to accept blatant error in order to avoid conflict.
Were are to use scripture to guide our doctrine when it is plain, and not dispute and fall out of fellowship where it is not plain. For "All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness, 2 Tim 3:16
And as far as going along to get along is concerned, that's fine and dandy until they start burning believers at the stake because of non-conformance to their non-biblical traditions.