This needs to be repeated occasionally: Alcohol is a disinhibitor. It does not change your personality. It degrades the self-control you use to conceal your real personality.
WHO YOU ARE WHEN YOU’RE DRUNK IS WHO YOU REALLY ARE.
Someone who’s “only a jerk when they’re drunk” is a jerk ALL THE TIME. They’re just able to control it when they’re sober.
Alcohol is NEVER to blame for anyone’s conduct.