בס"ד
You should see the difference between Kach's menifesto and Rav Kahana's ideology. It's not the same since Rav Kahana goes after Torah, Ahavat Israel. Some Kahanists have once said that if the Halacha was to give up on Jewish lands to the Arabs, they would have supported it. Kahanists don't have to always agree with Rav Kahana, but they should be aware to the situation with the Arabs, Islam, Missionary, Lefties, National self-respect, etc.
Let's just say I don't believe in such word as a "Kahanist".
PS: Gentiles can't be Kahanists, let's face it. It's something Torahnic and not just hatred towards the Arabs and Muslims.