> Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith.

Clarifying that "all" should be "most" is a good contribution. Writing off the comment with an insult is not. Especially if you don't even offer an example of one of the "plenty of things" to justify your claim.

In a casual forum, people use casual language, like using "all" for "most". Context matters, as when the comment is in response to saying something isn't political by an overly-narrow definition of "political"