The pistol-packin’ padre is not an unknown figure in Westerns — particularly 1960s European “spaghetti” Westerns — but you’d be hard-pressed to name movies which cast their rabbinical brethren in a similar action-figure mode. “Guns & Moses” exploits just that novelty as its primary hook, complete with an advertising image of the bearded, fedora-topped hero brandishing firepower over the slogan “May God and Your Glock Protect You.” Punning title aside, Salvador Litvak’s film promises a serious look at antisemitic violence, inspired by the 2019 shooting (which killed one person and injured three more) at Chabad of Poway Synagogue in San...