The Jews took the instructions from the Lord to separate themselves from the paganism of the Gentiles to imply that they should separate themselves from any kind of association with them.

This was wrong as: -> it kept them from sharing the knowledge of the Lord -> it resulted in the Jews thinking that they were better -> it caused resentment and persecution from Gentile nations -> it caused the Jews to reject Christ their healer -> it caused them to persecute Christians -> it caused them to pursue their own conquest of the earth -> it will cause them to support the Beast and his kingdom -> it has caused and will cause them to end up in the LakeOfFire.