By Angie Han Television Critic At the end of it all, a flabbergasted detective asks a survivor what’s just occurred. The victim, battered and exhausted and covered in blood, grunts out just two words: “Rich people.” That’s about the extent of the social commentary on offer from They Will Kill You, a new action-horror-comedy set in a Manhattan luxury building whose Satan-worshipping tenants engage in ritualistic killings of their mostly poor and marginalized staff. But it’s all the excuse writer-director Kirill Sokolov (Why Don’t You Just Die!) and his co-writer Alex Litvak need to unleash great big arterial sprays with gonzo style, to enjoyably giddy, if ultimately insubstantial, effect. Arriving just one week after Ready or Not 2: Here I Come hit theaters — and having first debuted at SXSW just a few days after Ready or Not 2: Here I Come did — They Will Kill You will inevitably draw comparisons. It’s impossible to argue they aren’t fair.…