Every government is collectivist. I think you have to establish this on a scale, with degree.

The most violent-criminal governments, to me, share the aspect of extreme inequality in power between groups. That can be the proletariat vs the kulaks, and it is often one race vs another. The power of Stalin relative to an average worker was greater than that of the US President to the same kind. In Conquistador-era Spain you had people judged by their level of Spanish blood with Indians being fit for slavery.