.
One tactic of Narcissists (scoffers, those with insolent pride) is to not only try to destroy their perceived enemy – but they also try to isolate them by driving wedges between their enemies and anyone who might possibly help them.
John 9:22
22 His parents said this because they were afraid of the Jews; for the Jews had already agreed that if anyone confessed Him to be Christ, he was to be put out of the synagogue.
John 12:42
42 Nevertheless many even of the rulers believed in Him, but because of the Pharisees they were not confessing Him, for fear that they would be put out of the synagogue;
see here and here for an explanation on how Pharisees were classic Narcissists.
3 John 1:9-10
9 I wrote something to the church; but Diotrephes, who loves to be first among them, does not accept what we say. 10 For this reason, if I come, I will call attention to his deeds which he does, unjustly accusing us with wicked words; and not satisfied with this, he himself does not receive the brethren, either, and he forbids those who desire to do so and puts them out of the church.
.