Leave it you to misread and misinterpret what I said.
I never said I don't understand races are involved in the riots (they aren't protests, so stop pretending). I said YOU were ignoring that white people are in the riots, as your response only mentions blacks. Police brutality isn't specifically a black problem, it is a society level issue that impacts all Americans.
Next, MLK said nothing to effect of which you are claiming. In fact here is the part of the quote you mistakenly identified: Certain conditions continue to exist in our society, which must be condemned as vigorously as we condemn riots.
He is not saying, I won't, he is "we must". He is against riots just as much as he is against racism. He doesn't believe riots are effective, rather they are a symptom.