The height of egotism?

The following is a slightly edited exchange from an internet forum that took place several years ago. My opponent had written to me the following:

It is the height of egotism to assume that only your religion can reach the Absolute Truth. Fundamentalism, whether Christian or Muslim, is inherently exclusionary.

It is the height of egotism for you to assume that only you (and those who agree with you) have reached the “Absolute Truth” that no religion can claim to have absolute truth. That statement of yours above is inherently exclusionary, for it excludes all those who disagree with you. It is also self-refuting and hypocritical since you just claimed the “Absolute Truth” that no one can claim absolute truth.

Was it the height of egotism for Jesus Christ to say that, “I am the Way, and the Truth, and the Life. No one comes to the Father except through Me” (John 14:6)? Jesus said, I AM THE TRUTH. That statement has absolute truth written all over it.