“I knew that I could never again raise my voice against the violence of the oppressed in the ghettos without having first spoken clearly to the greatest purveyor of violence in the world today — my own government.”

“I really feel that someone of influence has to say that the United States is wrong, and everybody is afraid to say it.”

Both MLK Jr. Plenty of people considered this “disrespect for the country” at the time.

https://www.nytimes.com/2017/04/04/opinion/when-martin-luther-king-came-out-against-vietnam.html