Oh, you guys don't even know what's going on here. I mean dear fucking good. Calling it the equivalent of a deal with David Duke is very very apt.
So. In the 80's there was an ultra-right wing party called Cach, which was led by Rabbi Kahana - And they managed to secure one sit in the Knesset. Their official platform was expelling all Arabs from Israel, outlawing marriage and sexual relations between Jews and gentiles - And more. The works. All parties of the Knesset practically boycotted them, even the Likud (mainstream right wing party, Netanyahu's party) walked out on every one of his speeches. His party was eventually outlawed from running to the Knesset, and was later declared a goddamn terrorist organization because one Kahana's disciples shot up a bunch of people in the Cave of the Patriarch massacre.
So, today there's a party ("Jewish Might") made up mostly of Kahana's desciples, and these are the guys Netanyahu is helping get into the Knesset by merging them into the slightly less insane far-right party (The "Jewish Home" party, which are only proto-fascist rather than full on Nazis.) One of their members, Itamar Ben-Gvir, is a lawyer who represented several right-wing Jewish terrorists, and he has a picture of the aforementioned guy who shot up a bunch of people in the Cave of Patriarch in his living room. Another fan fact: Before PM Rabin was a assassinated, he shot a video of himself touching his car saying "we managed to reach his car, we'll reach Rabin too!" (Rabin was assassinated by a far-right Jewish terrorist.)
It should be noted these guys were actually in the Knesset before, around 2006 I think - As part of the National Union party. But back then they were treated only slightly better than Kahana was. Mainstream parties like the Likud embracing Kahanism (even just to make a political alliance) is frightening.
It's a complicated question. In a recent poll, I think 35% of people saw him as most fit to be PM. So, not the majority, but the plurality.
It should be noted he's deep in about 4 criminal investigations regarding bribery as well.