Civics education is bad to nonexistent so they do not learn about the spoiler effect, let alone the inevitable math behind first past the post elections. People vote based on how they think the system ought to function instead of how it actually functions.
As an non-american, how this is not crystal clear even for the most hardcore communists is an absolute mystery to me.
As a non-american, here in my country leftists vote for many different parties, each too small to actually pass the threshold
Civics education is bad to nonexistent so they do not learn about the spoiler effect, let alone the inevitable math behind first past the post elections. People vote based on how they think the system ought to function instead of how it actually functions.