No, it isn't, that's the whole point. Belief exposure is determined partially by your parents, who, as a general rule, tend not to move terribly far from where they grew up, so there is a false parallel relationship between where you are and what you believe.
It is classic correlation without causation. Grouping of belief systems is more influenced by by the motility of the parent's generation than anything.
In times of economic strife, you will find that beliefs tend to co-mingle more as people move to where the food/money is and reproduce.
Oh and sorry to be so rough on you personally. In hindsight I was a doofus.
I still think you are totally wrong.
So you're just faulting him with automatically applying the transitive property? Perhaps a bit nitpicky but I agree with you.