Older Generation Americans Having More Issues With UFO Admittance by the Government?

 Well, yeah.

Generally, I think anyone under the age of thirty is likely to fully accept (say 90-percent or more) the idea that the government says UFOs are real.  

In the age group of 70 over older?  I'd say it's probably less than 10-percent who can believe the idea or feel comfortable with the idea.  

Someone like President Biden?  There's probably 10,000 questions he would ask, and they'd all lead back to a skeptical view....with him declaring nothing factual exists (even if you had a thousand videos by the Navy).  

What drove this serious amount of acceptance?  Mostly Hollywood, and some scientists giving calculations that there ought to be a minimum of a thousand cultures in the universe as a minimum.

The Hollywood effort brand 75-percent of aliens 'bad-guys'?  Well....that might not be a positive thing.  Course, Alf and 3rd Rock from the Sun made this more a comical thing than a evil thing.

So this whole acceptance thing is bundled up into two generations which can't come to a rational middle-point?  More or less.