First off they are born this way.
As seen there.
Plus since free will does not exist, they cannot help themselves, nor can you blame them for their behavior.
I can only hope for one day that the supreme court rules in favor of murder. Because we should change the defintion of murderer to handshake or something else.
All because they can't help themelves they are born that way. Not to mention this deterministic universe and the absence of free will.
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Remember what happened last time when scientists "identified" a "gay gene?"
Studies like this are far from conclusive.
Plus, most people inherently know that murder is wrong. You can try to rationalize it away until the cows come home, but people do know the difference between right and wrong.
Why are you calling a universe with quantum mechanics deterministic?1