That's the dream for most Dems, but I highly doubt it. The isolationists among Trump's base are a loud, but small minority; and his larger Evangelical base all believe Israel and the Jews are their allies. They've been chomping at the bit to take out Iran. Not too long ago, Trump even planned to take Gaza. Granted, the latter plan fell apart, but there's a reason he proposed something like that in the first place: because most of his followers would be for it.
The average American isn't MAGA, but the average MAGA is pro-Israel.
Speaking of mass deportations, just take a look at the guy masterminding the deportation scheme on Trump's right hand: Stephen Miller. A Jew. Do you think someone like Miller would be OK leaving Israel to fend for itself against a potentially nuclear Iran? Or would he not use his voice to support Trump's plans for Israel?