Trump's daughter is married to an Orthodox Jew and also converted to Judaism herself. That's something that's not like other religions where you can just say you're a Christian (of this denominator or that) - it's an official, tested, and very extended affair, particularly in the Orthodox tradition. In other words, it's "real." And Trump has always been deferent, come obsequious, to Israel, like many US politicians. In fact he was the first sitting President to visit the Wailing Wall back in his first term - traditionally US Presidents do that before elections.
Evangelicals are also probably the most reliable base for the Republican party (though remain a minority within it), and they have an extremely positive relationship with Israel.* And then on top of this the Israel lobby is well funded and tends to shower pro-Israel politicians in money in public, and I doubt the support ends there.
This is a somewhat long-winded way to say that - yes I do believe this administration is completely and sincerely focused on Israel and the interests of Israel, and I think there are a million reasons to think this is the case. And I also don't think this is a good thing, because the Israeli government seems to have lost their minds, and I think the world was already far closer to WW3 (and has been for a number of years now) than most appreciate.
What would be billions dead because of a nutter government and US politicians love affair with Israel would make just about as much sense as Brits killing Germans because a Bosnian Serb assassinated an Austro-Hungarian royalty.
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* - that's actually changing with younger generations, but it still remains mostly true.