Eyes, well since 12-13% of US population commit 50% of murder and brutal attacks, I guess your mom was right. Doubtlessly it would have created at more balanced US if they had placed a lot of blacks on ships to Africa efter the abolition but I guess it was too big logistic job. As for links on black violence they keep popping although I am sure numerous are deleted as soon as they appear đ±
Trump tweeted some I recall
https://summit.news/2020/07/13/blm-supporters-celebrate-death-of-mother-shot-dead-for-saying-all-lives-matter/?fbclid=IwAR07YvpxTu1bXT5n7tQVB-MwVFHLqBd5lHp_0qf3WkdOpKUaE4RNBoiglAM