Chances are, it would look like most of what they found good and righteous in the world is gone. Would you inflict that on someone?

How about you let him quickly experience the last 200 years for himself. As quickly or as slowly as necessary, maybe even actually living through each subjective day, or maybe doing the whole thing in five years. Allow his mind to reconfigure itself to our newer (improved) understanding of morality by the same process by which ours did.