Gentiles were lost 3 times over, but Israel's Messiah Jesus has come to save all who receive Him
Do not criticize or condescend down on another believer, causing yourself to be a stumbling block to them.
Paul encouraged Timothy to be confident when teaching God's word.
Having contempt for other people, can very well put you in contempt of God's court.
We are to receive new believers into the assembly, even if they have a different of opinion.