Merely intending to commit murder isn't a crime. You can
intend anything you want. You have to actually act on it. If I sit here at my desk so mad at you that I secretly intend to murder you but don't do anything, I haven't committed a crime.
We punish
assault with intent to murder (a distinct crime) worse than
assault because the
intent to murder makes whatever the person did morally worse. We want to punish it more. We want to deter it. Yadda yadda, look into the philosophy of punishment. There are multiple and sometimes contradictory arguments about why we punish.
If I walk up to you, empty a gun at you but miss, then we have a brawl because I cannot reload in time, there's a good chance I'm either going down on assault with intent to murder or attempted murder, even if all I ultimately did was bloody your nose. Those are two different ways in which the evil intent is punished more severely. They modify the assault. Now I'm not sure if what Doc said is true in every jurisdiction, but frankly the difference between a sentencing enhancement and a distinct separate crime, both of which punish an evil intent, is semantic
for lay purposes.
(I say that because there is a body of law about which enhancements must be proven to a jury beyond a reasonable doubt, and which can be imposed if a judge finds something by a preponderance of evidence after conviction by a jury on proof beyond a reasonable doubt. Start with US v. Booker and work your way forward 15ish years or whatever it's been).
If you think hate crime laws are wrong, you are necessarily bound to also think the distinction between manslaughter and first degree murder is unfair.
Case 1: Joe gets in a bar fight and punches Bob. Bob is drunk, so he slips and falls, hits his head, dies 14 days later from the injury.
Case 2: Joe hates Bob. Joe gets his shotgun and lies in wait behind bushes in Bob's house, knowing Bob stumbles home most nights because he's an alchie. He pops out of the bush and blows Joe's chest to bits one night, killing him.
If we ignore intent, as would be the case if you have a
principled issue with using intent in any way to measure culpability, you should say these should be treated the same. After all, as you say,
the victim doesn't give a shit - he's dead.
The rest of us would think "hey, but in the first case all he did was punch the guy. He didn't plan to kill him. He didn't want to kill him. He didn't even
expect to kill him. He was just having a brawl." From that we would conclude that maybe he shouldn't be punished as severely. Sure, it should be more than a simple A&B. Someone died. Eggshell skull rule. Yadda yadda. But it's still not as bad as plotting to kill someone then doing it methodically because in the latter case, Joe wanted that death to happen.
Hate crimes just focus on a different sort of intent. Rather than intent about the scope of injury, it's an intent about a specific class of people to injure.