Pick an issue that you find complicated, and grapple with it.
Choose one on which you’re legitimately torn or harbor secret doubts. Read up on it. Don’t rush to explain away inconvenient evidence.
Then do something truly radical: Consider changing your mind, at least partially.
I have a better idea:
Spend the summer learning how ordinary citizens can effectively resist autocracy.
Then do it.
Love,
tristero
PS Liberals don't need to be reminded to grapple with complicated issues and to change their minds when the facts warrant doing so. That's simply what they do.