I think they are dramatically different. Certainly context matters, where have the white people (and their culture) gone who left Detroit? Are you really alleging there has been a white genocide in modern day America? Do you know what genocide means?
"You deserve extermination for making any effort whatsoever - no matter how mild - to resist your extermination" Again the commonality with witch hunting - the left's playbook is the result of memetic evolution for what works