this is happening under trump and it's perfectly consistent with his opposition to the iran deal. it's amazing how some cultists manage to delude themselves into believing this is "the swamp" doing something he would disapprove of, lol.
trump's whole anti-interventionism shtick was always just an empty promise - as basically everything he claimed he would do for the american people (like give them the best healthcare system in the world, significantly lowering their tax burden, or bring their manufacturing jobs back). he obviously doesn't really care, and he sure as hell doesn't have the brains or the work ethic to do anything about it. he knew that claiming to be against forever wars in the middle east polled well, so that's what he did. unsurprisingly to anyone who's NOT completely braindead, he didn't walk the walk. no fan fiction will be able to hide that fact.
as for the iran deal itself, something that demonstrably de-escalated a highly problematic issue in the middle east, there is exactly ONE reason he opposed it so viscerally: barack obama. trump knows it was one of his main foreign policy achievements, a cornerstone of his legacy, well received throughout the whole world, so naturally that had him triggered to no end and determined to destroy it. i don't even think that trump, even though clearly a swamp monster himself, did it primarily to please the neocons (not that they cared for the motive as long as they get what they crave) or because he secretly wants war with iran for some reason. i genuinely believe it was mostly pettiness and envy that motivated him.
doesn't mean i think this was necessarily another CIA murder, directly orchestrated by this administration. could be bibi repaying favours, a joint operation, or a number of other options - not that it really matters, as the goal of this is so obvious: undermine any chance of getting back to the negotiating table and prevent a diplomatic solution with iran.