I guess rude is in the eye of the beholder? :) Your response seemed rude to me (challenging the use of a pretty common phrase to elicit elaboration), which is

I guess rude is in the eye of the beholder? :) Your response seemed rude to me (challenging the use of a pretty common phrase to elicit elaboration), which is why I suggested you were upset. Subtleties and true intention are often lost in written communication... :)