Who isn't? There's not much point in believing something inferior.
Here is the core of your problem, in bold print.
You are utterly convinced of the superiority of your beliefs,
Valid conclusions are not baseless presuppositions. Would you like some links?
not just in relationship to other world religions, but even in relationship with other Christians who may see things differently than you do. And why wouldn't they see things differently? This "absolute" truth of yours is anything but. It's based on a baseless presupposition - as Ravi Zacharias and others put it "God exists - agreed?"
If there's truth, you should agree therewith to the best of your ability. Also self-evident. (And if it weren't, there'd be no motive for rejecting the self-evident fact that there is truth.)
I don't agree. Why should I?