I think it reasonable to assume that of those 70 children killed at least one third to one half where killed by violent black lives matter criminals, and that the vast majority were killed in locals that have the strictest of the nations gun laws.
States, Counties, and Cities where these shootings occurred where probably in the high ninety percentile of Democrat control, I think I can safely say that without the need for fact checking.
Probably closer to 80%-90%. Most of the "childen" cited were 15-26 year old gang bangers.