On the one hand, using a term like that isn't really very helpful in trying to get your message across, and makes you look too antagonistic.
On the other hand, conservatives have been using the term "millennial" as an insult for nearly a decade, and to hear them cry about how mean the term "boomer" is just furthers the fact that they are just as big (if not bigger) snowflakes as the millennials they try to mock.