It was bad.
No. Not because the beating is horrifying commenters at the New York Times, but because it's a recreation of a 2006 episode of Emmy-nominated "Family Guy," called "Patriot Games," from season 4. The clip went viral then, and has stayed popular since.
Even worse. It's not the complete beating. Later, Stewie (the baby) throws Brian (the dog) down the stairs, brutally beats him with a club, shoots him twice, beats him with the gun and then burns him alive. Seriously. Watch: