I get where he is coming from, but his choosing this particular issue is stupid. If Texas decided that the federal law making slavery illegal just wasn't good and passed a state law allowing slavery, anyone outside Texas would be saying "fed gov pls! make them stop!".
Weed should have the same legal standing as alcohol. Unfortunately, I don't know of any methods to as accurately as a breathalyzer for alcohol test THC levels of an individual, so I can't be for a blanket total legalization of weed. And even then, this is a battle to be fought in federal law. First, why not petition and lobby more to have it removed as a schedule 1 controlled substance?