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...I will defend to the death your right to say it.
(lemmy.world)
https://quoteinvestigator.com/2015/06/01/defend-say/
"I Disapprove of What You Say, But I Will Defend to the Death Your Right to Say It." - Evelyn Beatrice Hall
The comic is actually self contradictory, because the top-left panel satirizes being tolerant with Hitler, while the bottom left satirizes accepting some wars. No wars would mean letting Hitler just go around annexing countries and creating concentration camps wherever he wants.
There's a big difference between defending your country within your borders and crossing a border to fight in another country.