> Have to be careful with definitions.

OK, so let's spell it out explicitly. The term "alt-right" was created by Richard Spencer, who is often described as a white supremacist.

https://en.wikipedia.org/wiki/Richard_B._Spencer

> Spencer advocates for a white homeland for a "dispossessed white race" and calls for "peaceful ethnic cleansing" to halt the "deconstruction" of European culture.[16][22][23]