<< I have this feeling that people that are not supporting his death would not support any form of punishment on him either. >>
What on earth are you talking about? Do not equate people who are opposed to the death penalty as soft on crime. We want McVeigh to pay - and pay mightily. But simply we believe that state-sanctioned executions are abhorent and inexcusable in any case. My convictions are consistent: No capital punishment ever.
<< What other punishment can be proportional to his crimes? >>
Your logic suggests that punishment should be a form of revenge. You are suggesting that if somebody crosses some threshold, death is the only remedy. We do have to assign fair and just punishments to the degree of the crime committed, but executions are never acceptable.
Can you imagine that we have a legal justice system where a judge can - legally - order another person to death? One man as an extension of the law orders the death of another. The Law is charged with protecting each and every one of its citizens, yet declares itself mighty enough to eliminate someone's life. Where's the logic? On execution day, the condemned is wheeled into the death chamber, surrounded by objects of civil society: law enforcement, prison staff, chaplains, press, witnesses, doctors. In a form of extreme irony, the doctors may not administer lethal injection because the Hippocratic Oath forbids a doctor to willfully kill another. As a result, a volunteer has to perform the task. The whole operation works in such an orderly, businesslike matter that we are made to believe that killing a criminal is somehow routine. After the condemned is murdered, the time of death is announced and the body is wheeled away. It doesn't matter that the life eliminated was a criminal; it matters that the state believes it has the power to kill without remorse, mercy or leniency. When the state kills, it has lowered itself to the level of the criminal. I cannot, in good conscience, allow my government to act in this destructive way.
What should happen to McVeigh? He should spend the rest of his life in prison, without any hope whatsoever of parole or release, denied of any freedom or liberty short of the natural right to life and reasonable safety. No one in their right mind would ever want to live that kind of life, so this sentence is very severe. However, it preserves the diginity of society and the honor of the victims by preventing the shedding of any more blood.