It seems to me that today's rationality is completely irrational in a sense that it attacks everything that is not rational. But who define what is rational? For example, many people like to back up their beliefs by scientific arguments or by pointing on the bad parts of religion. Yet in 19. century frenology was considered science. Today we call it pseudoscience. Is it lacking humility for most people or something else that they cannot accept that in 200 years people will laugh at our modern "science"?
And, if we are so deeply influenced by beliefs of our times why wouldnt relativism allow for more open minded approach in a sense that it would allow people to believe anything they want (without the need for justification) instead of using relativism primarily for attacking "old" beliefs (example would be the view that christianity is obsolete)?