Foremost question uppermost in mind would be why he chose me to be rude at! Of course one can brood about it in silence too.,!!
I think it is wise to not respond. But to acquire that kind of mindset is not so easy. Thanks. God bless us all.
Mostly rude people choose weak and vulnerable people as their target to throw all their tantrums,... they wont show their rudeness on strong people and higher authorities.