It probably sounds illogical the first time that someone hears it, but Iran should truly be thankful for Trump, and precisely for the fact that he's slated to be so anti-Iranian. The logic is simple enough -
the US never intended to fully normalize relations with the Islamic Republic and has always remained committed to destabilizing the country, it's just that Obama sought to go about it in a fundamentally new way by tricking the Iranian masses with the nuclear deal (just as he did the Arab masses with his disingenuous
2009 Cairo speech) in anticipation of an accelerated asymmetrical war against their leadership.
Trump, however, is a "straight shooter" that doesn't deign to such deceptions and says things just as directly as Reagan and Bush did, (international) "political/diplomatic correctness" be damned.
Iranians should be thankful that Trump is revealing what America's intentions have been all along because this signals to their leadership that they must continue taking preemptive action in mitigating these imminently more intense threats and shouldn't ever let their guard down again like some of the elite did over the past couple of years.
The Western-friendly "moderates" represented by Rouhani were lured by the promises of an economic-strategic partnership with the US, particularly one which Washington hinted could be used to "balance" an "out of control" Saudi Arabia, while the "conservatives" led by the Ayatollah and the nation's influential security forces knew better than to fall for such a ruse and have consistently remained cautious - if not outright opposed - to the US-Iranian rapprochement.
Comment: Sounds like a last gasp effort for the militants since they refuse to surrender.