בס''ד
Ron, you are a good Jew and you have good intentions, but you are wrong.
1. As Torah Jews, we are commanded to curse traitors and informers. We must curse them 3 times a day in the Shmone Esre. We must pray for their violent death:
".... למינים ולמלשינים אל תהי תקווה וכל הזדים כרגע יאבדו"
2. When Moshe Rabeinu came down from Har Sinai and saw the sin of the golden calf, he did give all of the sinners a chance to do tshuva (repent). But 3000 refused to do tshuva. Moshe ordered the Levites to kill all 3000 who refused to change their evil ways.
3. Pinhas killed Zimri, who was the leader of the tribe of Shimon, because Zimri was sinning with a woman from Moav. Until Pinhas acted, 24,000 Jews died in a plague that Hashem started to punish and warn the Jewish people not to engage in such evil behavior. In the Torah, Hashem blesses Pinhas and his family for all generations for killing Zimri. (Parashat Balak)
4. The Maccabees started their revolt by killing Hellenist traitor Jews.
So it is clear that righteous Jews are commanded to curse, and if possible, to even kill informers and traitors.
Righteous Gentiles are not supposed to curse Jews, but these self-hating Jewish traitors are karet (cut off) from the Jewish people. The Erev Rav are enemies of the Jewish people. Peace Now, the Bolshevik news media, Bagatz (the Israeli Supreme Court) and other traitor informers are enemies of the Jewish people. When righteous Gentiles curse them, they are cursing enemies of the Jewish people.
Obviously, we must all be careful not to curse Jews who are simply mistaken or misguided. And yes, we must appeal to mistaken and misguided Jews to do tshuva (repent).
We must also treat righteous Gentiles with love and respect. Righteous Gentiles will be baolam habah (in the world to come) where they will have eternal life. Jewish informer traitors will not be baolam habah.
To put it simply, if you offer me a choice between a pro-Israel Gentile and an anti-Israel Jew, I will pick the pro-Israel Gentile every time.