“Is Deckard the good guy or the bad guy in this movie?”
It’s all a bit of a gray area, isn’t it? You might think the replicants are just poor oppressed slaves trying to win their freedom, until they start brutalizing people who really had very little responsibility for their situation, even killing the one human who was voluntarily helping them for no reason.
Good. Bad. Doesn’t matter.
They were a threat that had to be eliminated.