>Syria has been an ally of the Soviet Union and Russia for decades through the Assad family
I realize that and I realize that this outcome is bad for Moscow, but the Nazis (and others, e.g., the Turks) went through Ukraine to invade Russia whereas no one has ever gone through Syria to get at Russia, so I would expect Moscow to care less about whether the government of Syria is aligned with Moscow than whether the government of Ukraine is aligned with Moscow.
I realize that and I realize that this outcome is bad for Moscow, but the Nazis (and others, e.g., the Turks) went through Ukraine to invade Russia whereas no one has ever gone through Syria to get at Russia, so I would expect Moscow to care less about whether the government of Syria is aligned with Moscow than whether the government of Ukraine is aligned with Moscow.