That's like ~40% of the deaths in the current gaza war, except over just 2 days instead of 2 years.
Sure you will get some nay-sayers who say 'a life is a life', if moral particles existed, they might be correct.
But for some reason, humanity doesn't seem to care as much.
What makes intra-state politics more acceptable to use violence?
Acceptable? It's more about the consequences or lack thereof, the incentives
History has shown that pretty much nothing happens to the regime unless two coalitions of countries invade from both sides simultaneously, and that's like, not going to happen