Okay, what reasons do you consider wrong?
It's great to support Israel, but when you put your ill-equipped son-in-law in charge of 'Middle East Policy', and fixing the 'Israel-Palestine' problem, what could possibly go wrong?
By unilaterally declaring Jerusalem the capital of Israel (regardless of the merits of that claim, one way or another) Trump proved he wasn't negotiating in good faith.
It's fine to support Israel, but it's counterproductive to support Israel to such an extent that the US loses its position as a disinterested third-party negotiator.
Obviously the US has interests in the region, and I'm not suggesting we go against those interests, but there's a way to do things, and Trump always acts from a position of grabbing headlines and doing the 'biggest, never before seen, most amazing' thing possible.
Well, guess what, orange idiot, there's a real reason that specific things weren't done in the past, and it has to do with diplomacy and rationality.
Things need shaking up, no doubt, but there's no reason to piss in someone else's cereal.
Trump has a near psychotic obsession with being the first to do something, or doing something that's bigger and better than anyone else.
That's not how complex multinational negotiations work.
.............
On a side note, while Trump 'massively' supports Israel, 'better than anyone, let me tell you', his actions in other regards belie that concept.
His support of Saudi Arabia is a great example.
He says that he supports Israel, and then apologizes for and sells weapons to the Saudi Prince, further destabilizing the region and jeopardizing Israel's safety.
Everything Trump does is transactional, and that means he is often playing both sides to the middle, which would be fine, it's just that he's so incredibly bad at it...