I’m not sure what the opposite of appeasement is in this context. A great power state invading/annexing/assisting a “separatist group” (whatever you want to call it) does not lead any direct escalation with another great power/superpower in this day and age. In turn I don’t understand how Putin has been getting appeased any more than other great powers.
One would have to reckon with all the wars and troubles that other great powers/superpowers make and how they are “appeased”, also. And that is awfully uncomfortable.
