Trouble is, those who ardently believe in the OT retributive God  -- and how are "going thou and doing likewise" -- aren't the one's building churches.    

Double Trouble -- their retributive scriptures aren't  focused on Hittites, Amorites, Canaanites, Perizzites, Hivites and Jebusites, but on Christians and Jews.   And even others of their own faith.