[BitWielder1]

One of many problem with liberals is their inability to distinguish between big and small problems, or even imaginary problems.
Trivial issues are frequently elevated to crisis status, while real threats go ignored.

[MrB]

You’re referring to the observable behavior.
The cause of that behavior is the refusal to (or disinterest in) examine an issue beyond the point where they feel good about themselves for having a particular opinion on that issue.