Let me break the meme down a bit for the slow kids in the back.
Imagine a leader is like the person in charge of a whole school.
Usually, a good leader tries to keep people safe, listens to them, and treats people fairly.
But imagine a leader who says, “Everyone, watch this! I am going to punish or hurt this person, and I want everyone to see it!”
The person saying this might be trying to make everyone feel scared. They want people to think, “If I disagree with this leader, something terrible might happen to me, too.”
Here’s what the big words mean:
Tyrant: A leader who uses power to control people and doesn't let them have much freedom.
Public display of dominance: Doing something in front of everyone to show, “I am in charge, and you can't stop me.”
Sanction fear: Making people afraid so they will obey.
Execution: Putting someone to death as a punishment.
Why compare Hitler and Trump?
I wrote this is saying that Hitler and Trump are alike because they believe both use frightening public actions to show power and make people afraid.
The main idea is: The writer is worried about leaders who use fear to make people obey them instead of treating people fairly and respecting their freedom.