One common characteristic amongst the people involved in today's standard angry mobs is a total inability to defend their opinion, and a total unwillingness to engage. Instead, they snipe by repeating things they sort of remember someone else saying and post memes, then disappear when engaged. A kind of personal deplatforming, where they don't allow contrary opinions to have access to their ears.

The way you learn how to defend your opinion is to engage with people who have different opinions, not having affirmation parties with people who are predisposed to agree with you about everything.

With the beneficial side effect of sometimes revealing that you are in fact wrong, thereby allowing you to improve your understanding. It’s sad and telling that people don’t seem to consider this possibility.