I do believe it's difficult for many young Americans and white Americans who weren't raised in the South to understand just how bad it was back during King's time. I was born in 1957 and raised in Texas and I have many fond memories of that time but I'm sure I would feel differently if I had been exposed to some of the other parts of town and what those people faced on a daily basis. King gave them hope that things would change and slowly they did change. So I understand both those who slam King for what is now presented in his name and I also understand how much he means to some people, particularly those who "were there". No, MLK wasn't perfect but I wonder how many people in history could match his positive impact.
Very few, my brother. Very few.