Thankfully, salvation does not depend upon our understanding of it. It's not that I don't think we should attempt to find all we can about all things concerning God, but we all come with prejudices that arise from experience, teaching, and our own predilections.
Since salvation only requires belief in the Lord Jesus Christ, we should look for areas of agreement and gently persuade others as God provides opportunity where we find receptive hearts, undergirded of course by prayer.