Why would God answer the prayers of those not His children...? For the eyes of the Lord are on the righteous, and His ears are open to their prayers 1 Peter 3:12
maybe because if he's the god of the entire universe, created sand and stone, drop and sea, then he's a little bit bigger than the patriotic, in-group obsessed, tribal types of our depraved time and place. maybe his ego can be set aside for five seconds in order to extend a little, what do you call it? grace to somebody who might be using the gigantic brain he handed them to call into question a few of the weird quirks left in 'his' message.
or maybe he just doesn't exist, and that's why he only talks to be people who are willing to imagine him talking to them.