Definitions
A major step in the process of moral equivalence and the destruction of standards of judgment is the destruction of definitions and language.
This is one reason why an Israeli helicopter pilot who accidentally kills a kid with a missile while attacking a Hamas headquarters and a Palestinian who deliberately blows up a bus full of students with a nail bomb are both labeled "terrorists" by the Left with no trouble at all.
When someone is trying to destroy the meaning of a concept, or even destroy the idea of definitions itself, watch out.