Where do we draw the line of sympathy?

I was watching the new Star Wars Maul show (spoilers) with my dad and there was once scene where a member of a drug smuggling crime syndicate had to pledge his allegiance to Maul after he killed the syndicates former leader. I asked my dad something along the lines of "do you feel bad for that guy at all even though he's already a part of a drug syndicate, or does he get no sympathy at all?" He kinda shrugged and said like "well hes already a bad guy so i dunno."

The character is meaningless, doesnt even have a name, but his scenario raises the question: Where do we draw the line?

When do we stop giving sympathy towards people? Do all bad people automatically get no sympathy regardless of situation? When evil is faced against bigger evil, does the smaller evil become less evil? When does an antagonist become a protagonist when faced with a much larger evil?

What about that guys family and kids (if he has any) or his friends or parents? Do we disregard the idea that this man is alive and has his own life just because he's apart of the drug syndicate? If the drug smuggler was sat next to a mass murderer at what point do we go "okay yeah maybe the guy on the left isnt so bad." Are they equal or can you have even less sympathy for the other? Can we have negative sympathy?

Anyways that was all i wanted to portray really. Good and bad are subjective and obvy everyone is allowed to feel whatever they want. I felt bad for the dude.