People instinctively defend their choices either consciously or subconsciously. It's a function of normal human ego. You don't have to relate this to programm

People instinctively defend their choices either consciously or subconsciously. It's a function of normal human ego. You don't have to relate this to programming languages and developers you could do that to other life choices such as; cars, foods, area of the country or world that you live in, etc... There's nothing inherently wrong in that attitude. What you relate as snobbery could easily be viewed as evangelism. They like what they have, they like what they know and they're communicating that. In any kind of evangelistic approach you communicate both positives of the thing you like and the negatives of the thing that you're attempting to replace. I could easily make the argument that how you chose to frame this question demonstrates the same ego that you're assigning to others because choosing the word snobbery as decidedly negative connotations to it.