One party is currently torturing and murdering civilians, which tends to skew the conversation in a particular direction. Once Russia has withdrawn all troops from Ukraine we can discus behavior of other nations.
Most parties are currently torturing and killing civilians, but some have better PR departments. Guantanamo Bay, Iraq, Aafghanistan, Syria, Libya, Yemen, Venezuela, and the list goes on and on. Nobody cares until white people die though.
Guantanamo is a stain on the US and will be for the foreseeable future, just like internment camps for Japanese people during WWII. But comparing either with Grozny, Aleppo (seriously, why mention Syria at all?), or Mariupol is either completely disingenuous, or entirely uninformed. It is also a complete false equivalence to compare them to the neo-gulags, just ask Navalny.
Which city did the US flatten since Dresden? How many hospitals did they voluntarily bomb? Hell, how many hospitals did the US bomb at all (and no, I don’t assume that number is zero)? Now, compare that to what happened in Karkhiv alone.
Playing chicken when Assad used chemical weapons on Syrian civilians and Putin razed Grozny were stupid mistakes. This is not a reason to let the same thing happen again in Ukraine.