They've had sanctions since 1979. Holy fucking shit. He has moved mountains
Trump wants a world at peace, not a world at War. He removed the 1979 sanctions. Regardless of his words, his actions alone prompted a response. He has earned respect.
The original 1979 sanctions on Syria were over
them occupying parts (and eventually, all) of Lebanon - initially supported by the Arab League and some Lebanese themselves who thought the SAA could end the Lebanese Civil War in its early stages, but astonishingly it turned out the Syrian ultranationalist Assad Sr. was actually planning on annexing Lebanon to realize his ambitions of Greater Syria - and also propping up terrorist militias aligned with them, including Hezbollah. In the long run, the Assads and their allies were directly responsible for crippling the Lebanese Christians (another Syrian agent, a member of the pro-Greater Syria ultranationalist and Lebanese-annexationist 'Syrian Social Nationalist Party', murdered
Bachir Gemayel, who was the single most brutal but also the most effective Christian leader in that war, then beat the shit out of the disorganized Christian factions for the next couple decades) and putting Hezbollah in ascendancy over Lebanon. That's one of the reasons I could never get fully onboard with the 'multipolar' crowd which had been among Assad Jr.'s biggest online cheerleaders. The other (even tougher) sanctions piled up over more recent years, especially after the civil war got going of course.
That said, there's no reason to keep those sanctions on now that the Assads are history. The new guy Trump just met with, Ahmed al-Shara'a (AKA Abu Muhammad al-Jolani), is pretty far from being trustworthy himself I'd say - his outfit originated as Al-Qaeda in Syria - but you could say much the same about just about anyone else who rules anyplace in the Middle East. AJ is also vehemently anti-Hezbollah (Hezb, which subscribes to the Shia sect of Islam, saved Assad's ass in 2013 & consistently heavily supported him against the rebels, who mostly belong to the rival Sunni sect, and AQ/HTS are obviously among the most extreme representatives of Sunnism in Syria, beaten out only by ISIS and a few smaller splinter groups), rejects the pan-Arabist/Greater Syria ideology and has actively been working with Lebanon to kick Hezbollah in the balls after Israel knocked them down. Furthermore he's a smart enough guy to not directly start an unwinnable fight with Israel from his devastated position even after the Israelis bombed him and sponsored an attempt by some of the Druze (another sect) in far southern Syria to secede, instead shutting the Druze and also Kurdish (anti-Turk commies up north, supported vs. ISIS by the US) secessionists down in his own way.
If (big if, but that's always the case with Islamist warlords) AJ contains his Islamist dictatorship within Syria's borders, doesn't fuck with Lebanon or the US, and generally proves more interested in rebuilding the ruined Syria rather than sponsoring terror attacks against his neighbors or even more distant countries - then that's already a pretty good outcome at this point tbh, if not the best one that can be expected realistically. Lifting sanctions as a big carrot to get him to move in that direction is probably a smart call, Syria was never going to become some liberal democracy with routine fag parades in Damascus no matter who won the civil war anyway so it's not like keeping the sanctions to try to force
that outcome would've been a good idea.