Just think at one time there were people who wanted to silence those who proposed that the world is round. Having debates is not wrong, silencing those who you disagree with is.
Disagreement is, like, “I’m going to have Apple Jacks for breakfast,” and you tell me that’s your least-favorite cereal ever made
“This thing is true, and this thing you’re countering my true statement with is not true” is not disagreement. It’s one person speaking truth and a different person making noise. If I say “I’m going to plug my phone in while I browse Saintsreport so it has some more battery power,” and you say “actually plugging your phone in will make the battery deplete twice as fast, your phone is on a one-way path to a dead battery” - you didn’t disagree with me, you lied to me. You can speculate that my charger isn’t long enough for me to use my phone while it’s plugged in, or you can dislike what color my phone charger is, but telling me it’ll deplete my battery moves out of opinion or speculation into falsehood.