It is not to say it wasn't shady and ill-advised, but the idea that Israel will be singled out for his traitorous ways is problematic, especially since there is proof of collusion in regards to China and Qatar. Where was his financial benefit? Was he manipulated? I believe it is possible. Then again, there are those who will automatically focus on Israel and Kushner's being a Jew, right? History shows that to be true.
ETA: Actually, everything I have read about the move it was Adelson who had the shithead's ear (and Pence...not a Jew, by the way), Kushner likely simply agreed.
ETA: To some extent, Mr. Trumps willingness to take such a risk underscores how little progress his peace negotiators led by his son-in-law, Jared Kushner have made. Six months ago, when the president last had to decide whether to sign a waiver to keep the embassy in Tel Aviv, Mr. Kushner prevailed on Mr. Trump to do so, in the interest of the peace process.
Since then, however, the administrations efforts have shown little evidence of narrowing the differences between Israelis and Palestinians. Mr. Kushner and Jason D. Greenblatt, the presidents special envoy, supported Mr. Trumps decision, officials said. source
So while he eventually supported the shithead's piss poor decision, it doesn't look as if he was instrumental in the decision; the shithead "president" was!