There are two ways of looking at conflicts, including this one. Strategic and humanitarian. From the strategic point of view there’s been a setback for Palestinians but from a humanitarian point of view it’s a great victory for Syrians.
Among Syrians there’s an almost universal approval of the ouster of Assad. Most/all Palestinians are also happy about it. I posted a video of a lecture by my favorite Islamic scholar who is a Palestinian. So, if Syrians are happy and Palestinians are happy, then who are we as outsiders to complain?
There’s also a philosophical or religious way of looking at it. Islam does not approve of the concept of using unjust means for a just end. To oppress 23 million Syrians to help 10 million Palestinians is not right.
I also happen to believe that Iran and the axis of resistance cannot solve the Palestinian problem by themselves. Unity among Muslims is required. The recent war has resulted in 200,000-500,000 Palestinian deaths, so it is apparent that the current strategy wasn’t working.
I can keep going on, but I hope I have clarified why I support the liberation of Syria.