...they condemn/attack those whose beliefs/opinions/interpretations of scriptures differ from theirs.
Various scriptures reveal to Christians that the judging of mankind will be done by Christ Jesus:
John 5:22,28,29, Acts 10:42, Acts 17:31, Romans 14:9, 2 Cor. 5:10, 2 Tim. 4:1, 1 Pet. 4:5, Rev. 11:18 & 20:12.
Christ said, “Do not judge, or you too will be judged. For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you," (Matthew 7:1, 2)
So everyone who claims to be a Christian should think twice before they try to do Christ's job for him.
He'll be the one to decide who got things right or wrong, so leave the condemning to him.