Yes, many you might encounter don't seem to be doing what He said to do, and you can read in the New Testament what that indicates, and you have one of those indications -- that the fruits show what kind of tree is there. "If the good book is not really changing people's heart and mind..." --> Christ also told also a parable about this (or more than one, and here is one of them):
Matthew 13 NIV
Have you ever read Isaiah chapter 55? It can be surprising, and I think you could get part of what you need there perhaps. But even more surprising to
anyone (including pastors and all sorts of believers A-Z) is to read through a gospel if they have not recently. His words are....alive.