believing the illusion

according to a recent article, understanding that freewill is a pure illusion (driven by physics) actually causes people to engage in more selfish, antisocial behavior - and this runs counter to many philosophies and religions where people become more ethical when they believe they have some sort of free will that needs to be reigned in, in order to appease a particular deity (hence their lives are driven by a higher spiritual order, rather than some cold, hard physical law.

so, believing in freewill is generally a good thing, even though we may understand at a deeper level, it simply is an illusion?