With regards to the Beer vs Wine thing, if it exists.
Through being involved, albiet at a lower level, with the Court of Master Sommeliers by taking the first level of their 4 exams required to be a Master Sommelier, I had the pleasure of bumping elbows with some people that are very serious about wine...including people working with some of the best wine lists in the country (Blackberry Farm being the most notable). Also have bumped elbows more than once with serious wine lovers to taste wines who were at a financial level far above me.
Virtually all of them to a person have been personable and extremely encouraging to me, even when they realized I was a novice and just beginning my journey into wine. Every bit as welcoming as the great beer community. And nearly all of them enjoyed cracking a beer as well.
Same at wine shops when visiting and asking questions.
I've bumped into the very seldom issue of wine snobdom....also happened with beer and with cigars, etc. But it is the exception and certainly not the rule. Generally people that are passionate about something are excited to share that with someone else, regardless to the financial status or depth of knowledge of those involved. --K