Trump is torn between the neoconservatives like Rubio, formally bolton etc, and Israel that want regime change and his own unwillingness to go full troops on the ground. The neocons successfully get trump to blow up Obama era deals designed to keep the peace by catering to Trump’s ego telling him he can get a better deal than Obama, in reality they don’t want a deal and want to escalate but this is the best they can get.

So trump goes to the negotiating table only to find out that Obama’s deal is the best he can get. Frustrated and unwilling to admit Obama was just as good a negotiator as him he begins to blame the leaders for their intransigence. The longer this goes on the dumber he looks for blowing up the original deal and not being able to get a new one, all the while Iran is enriching more uranium to try and push the US to accept the old deal.

Then Venezuela happens and he comes up with a new plan, if you can’t change the deal you can at least change the negotiating team. He can take out the leader, use them as a scapegoat for the long stalled negotiations, sign the same deal and call it a win. Maduro repeatedly said he was willing to play ball with Trump but it would be on similar grounds to the Obama era deal but trump couldn’t go back to the US and say he re-imoosed all these sanctions for nothing, so he took out Maduro, got a reason to declare victory and went home.

My guess is he’s trying to do the same here, say all the issues with negotiations were because of the Ayatollah, sign a new version of the same deal with Trump branding like the USMCA , declare victory and head home.

Is Israel gaining something that I’m not seeing? Destabilization the main goal?

Yes, Israel doesn’t want regime change because they know hatred for Israel is so broad that it will survive a regime change, especially one triggered by a war of aggression started by them. They want to turn Iran into the next Syria and get them to turn all of their ire inwards instead of at them.