Tradition is an important thing, especially in religion. In the Catholic faith, revelation comes to us through holy scripture and tradition, so its importance cannot be denied. While it is nothing new, there are many Catholics who wish to disregard or redefine doctrine or teachings that have been passed down for centuries, simply because they happen to disagree.
It is true that sometimes traditions must change. Sometimes the new ways are better ways. However, just as some would argue that just because something is old and accepted, that does not make it right, it is equally true that just because something is new and fashionable, that does not make it right either.
I was able to relate to Tevye's predicaments. Tradition is important. But then, none of the traditions broken (or changed) by Tevye had significant moral implications. This is a fact we must consider in our own circumstances.