People would be less inclinded to accept the idea if the proponents told the truth.
The FairTax proponents HAVE told the truth about the rate - you're merely unwilling or unable to understand it.
It is VERY clearly explained in a number of different places and on the FairTax website. It's even been explained hundreds of times on these threads, so your attempts at calling the FairTax supporters liars is very far afield.