Ok look there is an easy way to deal with these people. Take them through the steps logically.
Start:
Why did power elites form?
Capitalism, the state, and so on
Who are the power elites?
The rich, politicians
Is that a reasonably large sized group of people?
Sounds like it
Do you believe that they are all part of some secret Illuminati bullshit?
Yes, blah blah blah. Do you understand now?
Wouldn't the rich still control everything if they weren't part of the Illuminati bullshit? Just answer the question...
Yes, probably.
So what are you more likely to believe, that the President listens to a few men wearing black robes, or that he listens to some guys with briefcases full of money (an allegory, I don't actually mean that it happens that obviously)?
The bourgeoisie are the secret society that you're looking for which controls everything. Except they make it no secret that they control everything.
“How in the hell could a man enjoy being awakened at 6:30 a.m. by an alarm clock, leap out of bed, dress, force-feed, shit, piss, brush teeth and hair, and fight traffic to get to a place where essentially you made lots of money for somebody else and were asked to be grateful for the opportunity to do so?†Charles Bukowski, Factotum
"In our glorious fight for civil rights, we must guard against being fooled by false slogans, as 'right-to-work.' It provides no 'rights' and no 'works.' Its purpose is to destroy labor unions and the freedom of collective bargaining... We demand this fraud be stopped." MLK
-fka Redbrother