Lets take slavery as an example. Did you know that federal and state prisioners are forced to work for 30 cents or less an hour. If they refuse they get put in solitary. The average time someone is in solitary in the California prison system is 7.5 years. That is a form of torture. Slavery still exists lawfully so does torture.

Are you aware/against those forms of slavery/torture? Is everyone who is against slavery against this form? I think there is still some room for conversations around this issue and all of the other general topics.

I mean murder can be seen as a net benefit if someone murdered hilter before he took power.

Conflating legality with morality is silly.

Are you aware/against those forms of slavery/torture?

Yes, because there are some moral absolutes, which is why you retreated from a moral argument into a legal one.