GT - please do not take disagreement as a personal attack or condemnation. To the contrary - is not correction a form of love?
If you place so much importance on truth - then you must recognize that none of us has the perfect truth. That is withheld until we are reunited with God. Recognizing this, you know that you are subject to error and so are others - and there is no way around this. As such, do not take disagreement personally nor fear that just because someone disagrees with you that therefore one of you is in danger of hell.
1 Cor 13:8-13 Love never fails. But where there are prophecies, they will cease; where there are tongues, they will be stilled; where there is knowledge, it will pass away. 9 For we know in part and we prophesy in part, 10 but when completeness comes, what is in part disappears. 11 When I was a child, I talked like a child, I thought like a child, I reasoned like a child. When I became a man, I put the ways of childhood behind me. 12 For now we see only a reflection as in a mirror; then we shall see face to face. Now I know in part; then I shall know fully, even as I am fully known.
13 And now these three remain: faith, hope and love. But the greatest of these is love.