Or a simpler example: people who believe vaccines cause autism are extremely stupid and responsible for the death of extremely high numbers of children. To the extent that is legally possible, they should be shamed and ostracized for their dangerous behavior in an attempt to save the lives of vulnerable children.

Actually, the above is two examples. One where I stop after the first sentence, one where I include both. It is extremely offensive to some people, and the second (extended) version even includes a call to action that can be considered outright harmful (but done to reduce what is viewed by those who take the call as a greater harm).

Now in some cases, such as talking to someone who holds an anti-vaxxer view point, being offensive is counter productive. But when calling those already on your side to action, using such wording can motivate and mobilize others in ways that more sanitized language cannot.