As “The Righteous Gemstones” began its Season 2 run on HBO over the weekend, you couldn’t expect its scheming televangelists to stand on ceremony. Indeed, the newest season of Danny McBride’s prosperity gospel satire moves fast to send the blaspheming, self-aggrandizing scions at the show’s center — bumptious Jesse (McBride) and his equally conceited siblings Judy (Edi Patterson) and Kelvin (Adam Devine) — back into battle with one another and their own worst impulses.