my point is that the ideas of an individual can permeate society fairly easily and are likely to be believed by others who might not necessarily support that individual themselves
And the counter to that is that if people do not understand the ideological basis or argument for what beliefs they pick up through osmosis, then they are essentially taking it on faith. You are invoking the equivalent to an argumentum ad populum here, that they're right because they have numbers on their side, because they aren't deriving those beliefs from an educated view. Like this has ever decided the truth on any matter, or I suppose God put tapeworms on this Earth to teach you a lesson, as was the common belief in Europe until the spontaneous generation theory (also wrong) became popular.
Most people are capable of identifying normal and non-normal sex
Normal is relative. Again, throughout the Medieval period, non-reproductive sexual acts were actually technically illegal, even if enforcing it was difficult. This is the original definition of 'sodomy', not "gay men having buttsex." Hell, in the Roman era, straight bottoming was considered more degenerate than gay topping. So was cunnilingus. So, if your argument is "well they don't like you and it's fair because you have weird sex," then this is an ever-shifting target, and I can guarantee you that something you like and consider mainstream and normal didn't always have that status.