My answer is "Whatever meaning were you trying to use".
Which is entirely unhelpful. Moving on, then, because neither of us seems interested in doing the work to clarify things further.
But liberals do think it's real though, so it still works as a way liberals are driven by fear.
Hmm? It looks like you are indeed fighting a claim that wasn't made, then.
Fear is one of the major motivators of humans, in general, yes. However, not all humans are equally affected by it, with both positives and negatives to varying levels of effect. I am certainly not arguing that liberals are unaffected by fear, so your line of argument is entirely off the mark.
With that said, it might be helpful for you to review things like
Fear and Anxiety Drive Conservatives' Political Attitudes to understand what I was saying more in depth. For example, when I say physically measurable, part of that is that the size of the amygdala, which is heavily involved in dealing with fear, tends to be notably larger in self-identified conservatives than in self-described liberals.
To be clear, again, this is being said in a neutral fashion. Everyone is different in a number of ways and we all have various positives and negatives that make us more or less suited to handle different situations. That conservatives especially react more strongly and quickly to perceived direct and immediate threats than liberals is not a bad thing in and of itself, but is much more easily exploited by unsavory actors to push fears, rational and irrational, (and associated claims to the fears when one isn't thinking as rationally) that benefit the unsavory actors in some way. Liberals aren't immune to such, of course, but the hurdle tends to be notably higher, which tends to change the balance to notably fewer irrational fears compared to rational fears, with the note that some rational fears may not pass the hurdle as well, given that it's higher.
