The guy is bizarre, makes me nervous to watch him.
The fact that Nathaniel's appearance and behavior are bizarre is a strong indicator that he should be regarded as untrustworthy; that is, as someone who serves Jewish interests by making the unpersuaded majority of people associate opposition and distrust of organized Jewry with a lunatic fringe. If Nathaniel wanted to undermine or retard Jewish influence, he would make a concerted effort to appear serious and stable. Instead, he deliberately sours his appeal by associating the Cross of Christ with the antics of a clown.
To those who are already wise to the Jews and their aims, Nathaniel contributes nothing. Rather than break news, he simply repeats things revealed by critics more honest than he. He is fake opposition, not the real thing.
Our Lord tells us in the Gospels that we need to learn from our enemies because they have things to teach us. He does not say, however, that we should kid ourselves that our enemies are our friends.