The ability of some people to celebrate the deaths of people with whom they had political and associated disagreements, ignoring the fact that these people usually have family and friends and others who cared about them, is disgusting beyond measure. I will soft or hard block such users here when they reply in such ways on my threads.
If you don't have something nice to say about the dead, don't say anything. Show some humanity even when you think it's not deserved by the individual involved. You should want to be better than them, not embracing their worst aspects.