After months of in-depth research, I have discovered the reasons:

They speak louder than conservatives.

 

They speak faster than conservatives.

 

They talk over conservatives.

 

And worst of all, they never let conservatives respond.

Of course, this is why liberals  are always right, all the time.  Furthermore, liberals always end their conversations diatribes with the same words: “we must come together”. To a liberal, these words mean only three things:
1. I’m right!
2. You’re wrong!
3. Shut up!
4. Case Closed”

Okay, make that four things.

(Author’s Note: Obviously, since they are on the left, liberals are never right.  The best they can hope for is to be correct, which has happened four times since 1827. )