These things have I spoken unto you, that ye should not be offended.
They shall put you out of the synagogues: yea, the time cometh, that whosoever killeth you will think that he doeth God service.
And these things will they do unto you, because they have not known the Father, nor Me.
This chapter begins with Jesus’ explanation for why He told His disciples that persecution would come, but that the Comforter would also come. He wanted them not to be offended. The Greek word here is skandalízō, skan-dal-id’-zo; from G4625; to entrap, i.e. trip up (figuratively, stumble (transitively) or entice to sin, apostasy or displeasure):—(make to) offend. As you surely have already seen, it is the root word of our word scandalize.
Jesus wanted His disciples to understand that there would be persecution; but that it didn’t need to trip them up, or cause them to stumble. They were not to be tempted by apostasy, lured by the safety of denying their faith, because the ultimate prize was far greater than the earthly safety that would be theirs if they denied Christ.
Jesus warned them that they would be put out of the synagogue. That was roughly akin to being banned from all your family, friends, community. It is to be excommunicated, shunned, cut off from your normal society. For a Jewish man, it was a sentence to poverty and loneliness. The synagogue was the center of Jewish life.
Worse, a time was coming in which killing the followers of Jesus would be considered doing God a favor.
Perhaps this would be a good time to mention that there is nothing new under the sun.
Why would people want to kill the followers of Christ? Because they didn’t know Him, and in not knowing Him they did not know the Father. They would do their best to destroy Christians because Christians were leaving Judaism, and gaining converts wherever they went.