Which basically mirrors our society here in the U.S. as the aging population dies off.
Our youth have been given plenty of distractions (since 9/11 especially) to keep them busy. No time / inkling to refute (or even raise an eyebrow) the lie that LHO killed JFK is uttered/written. Very few "youngsters" today are even interested in the shooting, let alone dig into to the details.
I did my own little "study" of that a few years back when my daugther was in high school. Not many kids her age really gave a "rats behind" about the JFK assassination, many knew very little about it and nary a one had even seen the Zapruder film. When I showed that film to my daughter and about 6-7 of her friends, I then asked which direction did the head shot come from. "From in front of the car somewhere..." was the general retort.
Then I tell them about the SBT.
They were all shocked at the WC version, even laughed about "how stupid people were back then" to believe that one. I'm guessing the same goes for most under the age of 25 these days - that have never read/seen anything other than the "History Channel" or read a "history book" in school.