Why Don't More Christians Act Christian?

I have long maintained that the reason why so many champions of Christian teachings don't act nicely is that these teachings ring and very possibly are false and that there is probably no Holy Spirit to inspire the supposedly sanctified to exemplify the more salutary tenets of their faith.

That is, we're all only human, with very human urges to act badly at times, and there may well be no God within or without to help us override our human foibles.

Therefore, we might be well-advised to find the resources within ourselves and each other to override these foibles, and belief in highly dubious gods and religious worldviews might often be more of a hindrance than a help in this effort.