In a culture of “live and let live” you might convince yourself that another person’s religious commitments are none of your business. But ask yourself what you’d do if you truly cared about your fellow’s welfare. And why should someone’s spiritual needs be any less important than their physical needs.
While it is always tempting to theorize that it became popularized due to well known singers and cantors putting it to catchy tunes, it is really the other way around.