I disagree.
"Motive" can turn murder into self-defense...pre-meditation can turn 2nd degree murder into 1st...hitting your wife's lover over the head witha lamp when you come home and catch them in bed can turn murder into manslaughter.
The justice system has always looked at motive. It's nothing new.
only your first example speaks to motive.. the 2nd speaks to intent, the 3rd, to state of mind.
oddly enough, your first example is used as a defense and a defense only.
now, i'm not saying motive is irrelevant in all cases ( it is , however, treated as irrelevant in most cases)
in the case of self defense versus murder.. motive can be used to determine criminal liability... sure thing.
motive, alone, is irrelevant to criminal law.. the 2 "big" question are material fact of a crime committed and state of mind... often, a jury is instructed to ignore motive ( as it is irrelevant to criminal liability)
hate crime laws have been successful at a few things... 1st, discriminating on a basic of motive. ( a poor man killing a rich man is, as far as motive goes, an acceptable motive... but killing over race,sexual orientation or gender, is an unacceptable motive.)
2nd, it has been successful at giving police extra investigatory powers... ( when a hate crimes statute is invoked, it allow police to do an incredibly deep investigation into areas that are irrelevant to the crime committed and would not otherwise be permissible in court.... and the findings of those investigation is meant solely to prove motive, not criminal liability.. it is , for all intents and purposes, investigated as a separate crime.. a crime that the defendant is not formally charged with)
and hate crimes laws have been unsuccessful in other areas.. like in preventing hate crimes, or crimes overall...or decreasing bias ( some headshrinks think they actually add to the bias problem, and don't help at all) and making motive the primary factor in determining criminal liability ( no other motive allegation, presented by the prosecution, does this)
the good news is that SCOTUS has decided that juries are to decide, based on a preponderance of the evidence, whether the motive is one of the bad motives for committing a crime.. or a good motive for committing a crime.. it was once in the judges hands to decide ( in some states)
I think the intent behind HCEs are noble and honorable... but i don't find their implementation to be just or consistent and I think they tread too far into areas they shouldn't be treading... and i think they put to high a regard on a select few motives( while being silent on all other motives) .