@Sviatogor I agree totally with your conclusion, especially with this part

Mutation of R-M420 is older than modern  ethnicities. Besides, proto-Slavs,  the community of first linguistic shifters from proto-Balto-Slavic community could not have possibly have a single haplgroup in male population. Although, R1a may had been the dominant one.

same can be said for other meta-ethnicities. But some people just can not grasp that idea.