I won't cast stones at people who are disappointed it didn't work. Not because I agree with them, but because it's too easy to be a hypocrite. I am not drawing a comparison between Trump and these other people I am going to mention as I like Trump, BUT:
Would any of you renounce the assassination of Hitler, Putin, those of the same ilk? I doubt it. Even if you did, I would have a hard time truly believing it. Some people, even if we think they are wrong, truly believe he is the same as them.
We all have different levels of belief of right and wrong and how it applies to each of us. I am not religious but don't believe even those that are won't secretly think "that was probably for the best" depending on the exact situation. Does that make you a bad person, I don't think so, it just makes you human.