The reason, not excuse, to execute someone is simple, they've executed someone else themselves. This isn't a difficult concept really. Just because you don't agree doesn't mean you are right or more advanced. You may be, you may not be, but you are not in the position to make that determination.
If America wants to execute people, THEY WILL. Not having the drug sold to them will not change that, as clearly demonstrated by finding alternate methods.
Finally, Propofol is not used for executions, Euthasol is. Pentobarbital Sodium. And its not difficult to manufacture, its patented. America could easily make it if they want to ... of course they'd be in violation of several international trade treaties that they expect Denmark to follow, so its really not something that anyone is going to do. Euthasol is patented by a Danish company, for reference, and they refuse to allow it to be sold to a state government for the purpose of executions.
Perhaps if you knew a little bit more about the issue you wouldn't be making silly opinionated statements as if they were fact.
I'm sorry you're too simple minded to understand that some people are not worth letting live, but thats the reality of it. Not everyone is worthy of life, deal with it. You don't want to execute them, fine, don't. We have other people for that. Consider yourself VERY LUCKY to not have to have had to experience something so horrible that you believe the only response is to take someone elses life, and hope that you never end up knowing what it feels like.
Of course, as demonstrated by Utah, executing people isn't difficult, they'll just shoot them or hang them, thats ALL THAT HAS BEEN ACCOMPLISHED.
Instead of people being terminated quickly, painlessly and with no suffering, now they are fully aware of the end of their life as it happens. This is clearly a much better solution.
Personally, I'm happy for the lack of availability of Euthasol for use in human executions. Anyone who deserves execution does not deserve a quick, painless termination, they deserve to suffer as much as possible. The only way to make it better is to make them suffer like their victims, and their victims are NOT JUST THE PEOPLE THEY KILLED, but also all the people left behind. When someone murders another innocent being, plans it out, does the execution and shows no remorse at all (all of these things are the requirement for the death penalty in most places) ... and it happens to be your loved ones ... then get back to me on your high and mighty horse, until then ... stop pretending you're so enlightened. You aren't, you're just naive and selfish and ignorant of reality.