You don't need to be a race car driver to debunk a sales man trying to tell you "This is the best car in the world!".
My advice to you is to be humble, you're clearly passionate about Lisp and turn that into a positive thing. Saying Lisp is the best language in the world is a sweeping statement, something a snake oil salesman would put across.
I first used Lisp more than thirty years ago (back then on the VAX), but I still don't understand why it is supposed to be the "best programming language" (as some people continue to claim). It is not even obvious to me how to recognize a programming language as the "best" one. The advantage of the simple syntax is paid with several disadvantages. Praising Lisp for its simple syntax is like praising a protein for its simple structure consisting only of a chain of amino acids.
Fairly extensive advocacy pieces already exist, and we need even more sophisticated ones, and better infrastructure overall, and it would be much easier to do that with proper funding.
