“One could say that Syria had lost them for good once they lost them to ISIS.” ISIS, not Rojava.
My bad. But Rojava never meant to secede from Syria. They are still called DAANES today, administration of north-east Syria. Yes, they took the oil fields to fund themselves. But without any other source of funding (their main industry is agriculture) it was an attempt to secure a source other than US aid. We wouldn't fault a person stealing to feed themselves, in my mind it's the same thing.
As I mentioned in another comment, SDF could have done "whatever they wanted" in the areas they control, but they decided to build an egalitarian, democratic society that respected minorities and religions. What more can you ask for under the circumstances? Yet they did much more than that.
If a little "thievery" is the price for that, if I were in their shoes I would have done the same. Stalin was a bank robber, for example. I'm sure he stole from some people who were nice.
Yes, and it did not deserve critical support at that time.
Right. But we can see that conditions can change. Also, I think there are degrees of cooperation. You cannot say that Rojava is the same as Israel, for example, when it comes to cooperating with the US.
There are only about 1000 US troops left in Syria. US has no intent on fighting Turkey or their militias, they didn't help SDF hold Manbij. It's unlikely the US would help the SDF fight against HTS if they decide they want the oil fields DAANES controls.
But let me ask you this, what would have to happen or what kind of conditions would there have to be for you to think that Rojava is a socialist project worth studying? There's no Syrian government for SDF to give back the oil to.