I would be surprised if the "dirty goyim" quote is accurate. He has been working with pro Israel Christians and inviting them to the Shomron. I also think comparing him to David Duke is way off. He is an Orthodx Jew who lives in the Shomron.
Clearly there is much you don't know about this man and his record and what Revava has done. All that I said is completely true. Ask Chaim about some of his antics on Ask JTF sometime.
Beyond that I know little about him, other than he is a spokesman for the Shomron Jews.
He is an employee of the Yesha Council.
I know he and Chaim don't get along which is unfortunate. Even if they have different views on some subjects, there are so few people who support the Jewish right to live in all of the Land of Israel as sovereigns that it seems like a waste to have name calling between them.
Once again you don't know the history. Chaim did not even know who Haivri was until he started calling him Hitler.
They can agree to disagree on some subjects but still see the big picture of common goals.
They have no "common goals". One is a man who wants to save the Jewish people. The other is an opportunist phony Kahanist, who lies about his background with the JDL and HaRav Kahane, in order to mooch off of right-wing Jews. Would a truly righteous Jew be collecting a paycheck from the Yesha Council? There is even some speculation he could be Shabak. He actualy turned in Mike Guzofsky, his archrival, for having an "illegal" dog training program (Guzofsky is just as bad, but informing is informing).
FWIW I asked the settler who showed me around Yesha about JTF and he just said it is not his cup of tea. He also did not support the Price Tag operations and said he would have been disappointed if the IDF was unable to complete the expulsion from Gush Katif which he opposed. Should we curse him? I think we focus too much on negatives and disagreements sometimes.
That's not my call to make but I certainly do not consider him to be a good Jew based on my definition. On the other hand, he is merely reflecting the postmodernist, secular, brainwashed worldview of 75% of Israel.