Are Economists Exceptionally Christian?

Alex Tabarrok has an article claiming that economists mostly support immigration and outlining reasons why hereTCS Daily - Why Ruin the World's Best Anti-Poverty Program?: His points include:

"Economists are probably also more open to immigration than the typical member of the public because of their ethics -- while economists may be known for assuming self-interested behavior wherever they look, economists in their work tend not to distinguish between us and them. We look instead for policies that at least in principle make everyone better off. Policies that make us better off at the price of making them even worse off are for politicians, not economists."

Somehow this seems "christian" to me, in the old golden rule sense.