"white supremacists in Canada and the U.S. killed at least 40 people, up from 17 in 2017."

https://www.splcenter.org/fighting-hate/intelligence-report/...

1. That doesn't show any long term trend.

2. It isn't normalized against overall violence trends.

3. Although obviously terrible, it's still an incredibly small number of people in absolute terms. 259 people died while taking selfies since 2011 [0].

[0]. https://www.cnn.com/2018/10/03/health/selfie-deaths-trnd/ind...

And even less people are killed by terror threats worldwide. Also a small number of people die from shark attacks or from airplane crashes. It doesn't stop people from taking safety precautions.

What data would convince you that the threat of white supremacy is increasing?

Research done with a well designed methodology that explains how the data was classified in the first place.

It has to explain how it labels "hate" crimes; is the crime perpetrated by a clear member of the said group, how do you define the relation, etc.