If you assumed you have been born again for years and despised another who isn't born again or matured spiritually, you are are living in error. It is never about how far but how well. No man can decide who should be saved and condemned. The greater your sinful nature, the greatest the grace God releases for your salvation. The degree of God's mercy you received should be the degree of your love and commitment to God. If you are forgiven from what should have condemned you, learn to forgive others and give them the opportunity to change. Be your brother's keeper.