These people should be executed because of what they have done, not because of who they are. They plotted to kill thousands of Americans and then executed that plot. They were apprehended in the course of a war against their armed irregular group. To say they are entitled to "life and liberty" is patently absurd - the preamble to the Constitution has no legal force, and even if it did, it is obvious that its "protections" would not apply to enemies of the nation intent upon its destruction. Indeed, the one thing one isn't allowed to do is attempt to overthrow the government, yet this group seeks to do that, among other atrocities.