That's your pet theory. I don't give a crap about "Mammons." Calling them "mammons" is just another way of saying they are false Christians, not true Christians. These people call themselves Christian and think of themselves as Christian. They behave badly in the name of Christianity. It does no one any service to say they aren't true Christians or call them "Mammons." It's all the same fallacy.
Mammons, by the way, are not real, so they can't really "be" mammons, can they? Just like virtually everything else in the Bible isn't real, and its entire content is subject to wide ranging interpretations to suit the present culture, politics or personality of the people who follow it. The truth is, too many who have called themselves Christians through the ages have made decidedly negative contributions to humanity. That is a material fact. What you want to call them is more a matter of semantics.
It is pointless to argue biblical interpretation to play definitional games over who is a Christian and who is not. If they call themselves Christian, and think of themselves as Christian, then for all practical purposes, in the real world, that is exactly what they are.