Acts 2:37-40

Acts 2:37-40. And said unto Peter and to the rest of the apostles, Men and brethren, what shall we do? Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. For the promise is unto you and to your children, and to all that are afar off, even as many as the Lord our God shall call. And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation.

Not, "save yourselves"; but "save yourselves from this untoward generation." Come out from among them. They are guilty of the death of Christ; you will be found guilty of it, too, unless you now disown the people who committed that awful crime. Come right out from among them, and be altogether separated from them.