From Dr. King's 1967 speech:

As we counsel young men concerning military service we must clarify for them our nation's role in Vietnam and challenge them with the alternative of conscientious objection. I am pleased to say that this is the path now being chosen by more than seventy students at my own alma mater, Morehouse College, and I recommend it to all who find the American course in Vietnam a dishonorable and unjust one. Moreover I would encourage all ministers of draft age to give up their ministerial exemptions and seek status as conscientious objectors. These are the times for real choices and not false ones. We are at the moment when our lives must be placed on the line if our nation is to survive its own folly. Every man of humane convictions must decide on the protest that best suits his convictions, but we must all protest.

A man in his 60's finally says what he could not find the words to say in 1964:  Based on my commitment to personal truthfulness, I cannot be silent about the consequences of organized killing on those who perform the organized killing.  For many soldiers, to participate in war is to commit emotional suicide.  I am convinced that all armies and all governments lie to their citizens about this and I refuse to participate in such lies.  Pinning a medal on someone’s uniform will not erase from that person’s mind the faces of those whom they have killed.  As St. Paul says, we are all part of one another, therefore, I believe that when we deliberately injure others, or support the injury of others, or look away when others are being injured, we injure ourselves, and we injure our relationship with God, with life, and with all other people.  I believe that when we kill others, we kill a part of ourselves. Therefore, whenever and wherever possible, I will try to compassionately dissuade people from participating in or supporting organized killing, and I will do everything within my power to help people find peaceful resolutions to their conflicts.