[lexcorvus]

Conceptually, regulating new legal family relationships on the basis of existing family relationships is different than doing so based on some other non-family status, so there is no real reason why positions on these should be expected to correlate.

This rationalization of anti–cousin marriage bigotry makes you sound like an Islamophobe who cares little about violating Muslims' religious liberties by denying them their basic civil rights. Be careful not to get purged.