In Jerusalem's ancient temple of King Herod, there was an outer courtyard in which Greeks, Romans and non-Jews could gather to pray, pose questions and debate with any religious authorities willing to do so.

Whether modern clergy want to admit it or not, Facebook has turned into a "Court of the Gentiles" for two billion-plus users, said Bishop Robert Barron of the Catholic Archdiocese of Los Angeles, speaking recently at Facebook headquarters near San Jose, Calif. Social media is where people air their doubts and convictions, hatreds and hopes.

Religion is often a bone of contention on Facebook, said Baron, an auxiliary bishop known for years of work online and in mass media. However, these digital faith fights rarely offer constructive arguments that produce clarity and understanding, as opposed to anger and confusion.

What the Internet needs is better arguments about religion, he said, in a talk that featured numerous lessons from St. Thomas Aquinas, but only one allusion to President Donald Trump.

"Some people say, 'Why are you encouraging people to have arguments?' By 'argument,' I mean something very positive," he said, in a talk that, logically enough, has been posted on Facebook. "If you go on much of social media – I've been doing this now for much of the past 10 years, doing evangelization through the Internet – you'll see a lot of energy around religious issues. There'll be a lot of words exchanged, often very angry ones – a lot of energy, but very little real argument about matters religious. …

"That's a serious problem, because if we don't know how to argue about religion, all we're going to do is fight about religion."

Many Facebook combatants act like they can force other people into agreement, he said. Others "throw up their hands" and assume it's impossible to make progress when dealing with religion. True arguments take place in the middle, among people who believe faith and reason can work together.