Meanwhile, some on the right wing in the US are calling for the annihilation of Gaza, and Israel has been indiscriminatly killing Palestinian civilians for a long time. What Hamas did was horrific, but this attack does not exist in a vaccuum, and there are literally mainstream politicians calling for the death of civilians right now
The religious nuts want the jews to completely own Jerusalem because that's a prerequisite for the end of the world. In that instance, they fully support Israel. The far right in general kinda likes Israel because it's a modern ethnostate and apartheid state.
There are non-religious people on the right as well. The far right hate Jewish and Muslim people and are cheering on the conflict without picking a side because they view it as their enemies destroying each other.
Much of the modern far right are economic right or anti-education right, looking for an authority figure to put them above the other guys. I don't think they care about the end of the world as long as it's at least 2 days after they die and the folks ending the world give them special treatment until that day.
The religious evangelical Christian nuts want this because of the "Left Behind" series. The overwhelming majority of Christians are Roman Catholics and do not require the Jews in Israel to die to bring about the second coming.
No, they are absolutely pro-Israel, and constantly use their unwavering support for Israel as a bludgeon against their political opponents who have a more nuanced view