I use to work for Best Buy (in the PC department) way back when they expanded to California, it was a college job and during the heyday of the PC.
Best buy is full of fanboys, I was one and it was great, but when I sold products it was only PCs (HP, Packard Bell, Acer, emachines, IBM, think retro) and nothing else really. These days the flavor is Apple, and the morons that work there think they are competent in everything and anything related to computing, they are terribly wrong. Anyone on this forum can run circles around these so called experts.
I had somewhat of a similar experience to the OP, I went to buy a passport hard drive at best buy and showed them that the in store price was higher than bestbuy.com. They couldn't get their computer working to do the comparison so I showed them on my Samsung Galaxy smartphone, I was very quickly derided over my choice of a smartphone and the associate pulled out his ipad to take a better look (completely not necessary), more to show it off than anything, and I really didn't even care, I just wanted the hard drive. At the same time another guy wanted to buy an Ipad and the salesman just stopped helping me and went on and on about apple with the other customer. Even the other customer said, shouldn't you finish up with him first, I said don't bother I am going to find the store manager. Luckily, I knew the store manager from my earlier days (he used to work with me during my time there) and got it resolved and the idiot best buy employee was written-up.
Now even though I worked at best buy when I was in college (some 14 years ago), I was smart enough to know not to lecture a customer, great customer service means answering questions without bias and delivering what the customer wants. Ultimately the goal is to make the right sale so it's not returned later. Secondly, you never ignore one customer over another, I know my $99 hard drive wasn't the same as a $499 Ipad, but they don't work on commission and shouldn't care.
Anyway, best buy sucks and karma is coming back to bite them, they put record stores and many other electronic retailers out of business and now
Amazon and e-commerce is doing it to them. I won't miss them.