Assad fled to Moscow - has Assad regime fallen?

[soandso]

21. They're a spin off of al Qaeda

HTS conducts small battles against the Syrian regime, its militants, and other jihadi groups because they all go against its ideology. They mostly operate in Syria, particularly Idlib but also Aleppo, Hama, and Dera’a. The power retrieved by the group, on Turkey’s behalf, has provoked an increase of violent strategies aside from military tactics. In extreme cases, they undergo hard punishment for fornication (i.e. stoning people to death). They also gain money, either by holding people for ransom or attaining the attention of government personnel for political action. Some of their hostages include UN peacekeepers, Western reporters, and Lebanese soldiers.

https://thekootneeti.in/2020/10/14/the-evolutionary-strategies-of-hayat-tahrir-al-sham-in-syria/

In July 2016, al-Nusra formally re-designated itself from Jabhat al-Nusra to Jabhat Fatah al-Sham ("Front for the Conquest of the Levant&quot and officially announced that it was breaking ties with Al-Qaeda.[42][43]

The announcement caused defections of senior Al-Nusra commanders and criticism from al-Qaeda ranks, provoking a harsh rebuke from Ayman al-Zawahiri, who denounced it as an "act of disobedience".[44] On 28 January 2017, following violent clashes with Ahrar al-Sham and other rebel groups, Jabhat Fatah al-Sham (JFS) merged with four other groups to form Hayat Tahrir al-Sham (HTS), a new Sunni Islamist militant group.[45] Tahrir al-Sham denies any links to the al-Qaeda network and said in a statement that the group is "an independent entity and not an extension of previous organizations or factions".[46] Mutual hostilities eventually deteriorated into one of violent confrontations, with Al-Nusra commander Sami al-Oraydi accusing HTS of adopting nationalist doctrines. Sami al-Oraydi, alongside other Al-Qaeda loyalists like Abu Humam al-Shami, Abu Julaybib and others, mobilised Al-Qaeda personnel in northwestern Syria to establish an anti-HTS front in north-western Syria, eventually forming Hurras al-Din on 27 February 2018.[47][48][44]

https://en.wikipedia.org/wiki/Al-Nusra_Front

See, these Salafist groups divide like cells and re-form into other groups, who have differences with each and fight but are all jihadists. Some want a stateless caliphate and some just want to control Syria (and other places where they've operated) but they are all dangerous, criminal and extremely violent.