Mike Pence belongs to a Dominionist/reconstructionist sect of Christianity not too unlike the one Ted Cruz belongs to.
Christian Zionism being what it is, it's really quite common to see support for Israel among a wide number and variety of churches, as it sets out the plan for the Second Coming of Christ, however when we get to the parallel idea that the Jews ought to be encouraged to become Christians as a means of fulfilling Biblical prophecy, we start to run across a few outlier belief systems that state that "Jews are in reality Christians who have not been perfected yet".
It doesn't stop there, because Dominionists believe that God has tasked them with forcible conversion of Jews, by the sword if need be, and the right to put to death any who refuse conversion.
This is not a secret, it's not even an open secret, it's open fact and it is preached in their sermons.
I'd just kinda like to check with the Jewish people on their feelings on the matter, because if they're not on board, then this whole "support for Israel" business on the part of the Dominionist/Reconstructionist sect boils down to a real estate squabble and nothing more.
In the meantime, Mr. Netanyahu, who is well aware of the stated beliefs of Christian Dominionists, is every bit as happy to use them as tools and useful idiots as Trump's billionaire oligarchs are.
The rest of us are outside these circles, so it's not unusual to consider the fact that the rest of us are wondering WTF is running through these people's minds.