I'd argue only some alcohol control laws exist for religious reasons. Some of those old puritanical laws are still on the books, but stick around today because they are useful for regulatory capture.

I think in this case (liquor stores being closed exclusively on Sunday morning in Texas), you'd need extraordinary evidence to assume that it's not because of the facade of puritanical ideals.

Perhaps that's not the case in Northern New Jersey (which, crazily, also has similar rules) though.

I was thinking along the lines of alcohol control laws which limit licensing, distribution, sales, etc. Those groups with preferential treatment have become special interest groups in many places that want to perpetuate those limits because it prevents competitors. Somewhere around a quarter of states have mandated some form of monopoly in regards to alcohol, and others have limited licensing schemes that are highly politicized.