2 Pet peeves in a ROW! You hit the nuisance lottery.
Another one of my "favorite" people is those with those mysterious "credentials". In this day and age, it's easy to get certs. It doesn't mean you ACTUALLY know anything all it means is you MEMORIZED for the test.
I can go on about this ALL week, but I will spare you. Same goes with people with degrees from Harvard and "other" schools, like somehow my piddly degree from DeVry and 15 years of work experience means ZIP.
Yeah.. I need to stop now.
Take it all with a grain of salt, use Google to your advantage to prove him wrong (like now). Once he sees you can basically discredit his "assumptions", he will back down and you will get more credibility.. You seem competent.. you just need to get on the job experience to prove your worth.. you are my kind of people.