What about the claim that "not all claims to Truth [sic] are equally valid"? Is that claim also "equally valid"?
Relativists typically end up arguing that "All truth is relative, except the 'truth' that all truth is relative, which is absolute". A logical system constructed around such blatant special pleading isn't a very sound system.
I heard Frank Peretti yesterday on Focus on the Family. This is a paraphrase.
Relativists say we all create our own reality. In that case, you created me. So if I bother you, take it up with yourself...
I didn't say that. I only said that to me all of the claims are equally valid. I should have perhaps said it more blatantly, that all of the claims are equally invalid, with nothing really to support them.
"Our government makes no sense unless it is founded in a deeply felt religious faith. And I don't care what it is."
-- Dwight D. Eisenhower