[ForgotMyPwOops]

I don't think you can justly punish people for an unquanitifiable "group harm" with regards to speech

You could easily use such a justification to ban anti-war speech (something that has been done before), or ban speech against whatever you favorite political view is

[slg]

I'm not sure why we need to quantify the harm, but even if we did, how does that harm change? Why is it illegal to lie about an individual but it is legal to make that exact same lie about the group in which that individual belongs? Wouldn't you be equally harmed if I said "ForgotMyPwOops drinks the blood of babies" compared to if I said "Everyone of ForgotMyPwOops's ethnic group drinks the blood of babies"?

Also we could just limit this to protected groups as they are currently defined for discrimination. That solves your problem with anti-war speech or generic political views.