a bad person

[bennyboy]

It's a good answer but to the wrong question I believe. I asked for what ground of motivation, and not the process. Of course I know how that works.
How, to be specific, can you justify/explain(/on what ground) that, for exemple how it goes in america, someone can be executed just for not fitting in the big picture made up by some people called the law; just a bunch of rules.
We can look at it in another way too: why do we find the laws of ISIS wrong and ours not, since when no 'sky daddy' is around every rule is subjective. So the only difference should be a 'slight' other opinion on what the rules are.

Do you agree?

The ground is that people don't like something. Essentially, it is immoral to go against the views of the group.