There are several situations when I would comment "Damn.. Look at that guy. He is trying to squeeze in by hurting those poor people, just because he did not manage his time properly. He deserves some pain", "These people at the airport come so late, and demand entry as if they are presidents. These people should miss the flight!", etc..
I am usually not so evil, but there are some situations that bring out
the worst in me, and even if I am not committing any physical
crimes, I end up committing all these "thought crimes".

Is there a word in English for "having a feeling/urge that someone, who is seemingly unreasonable or has committed some seemingly bad act, should deserve something bad her/himself!" ?

"Comeuppance", perhaps? One will often hear it used in the sort of setting you describe.

[just] deserts or karma, although no value judgment is inherent without context.

Quote:

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[just] deserts or karma, although no value judgment is inherent without context.

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Which is why I went with comeuppance. Even though the dictionary says comeuppance can be used of either good or bad karma, I've only ever seen it used in the negative sense.