I am sorry that friends would treat your family like that. In life many things are not for everyone. If the world had more tolerance of the differences in peoples tastes or lifestyles, the world would be a better place. As we try and teach our children, I would recommend doing your best to rise above it all and take the high road. It is hard to do.
All that said we have had some family and friends react negatively for different reasons. Often we hear negative comments. Fortunately, we have not had so much direct conflict as you have had. It is a bummer to have people we know express negative views about
DVC or Disney as we enjoy it so much. I usually comment back that I understand that Disney might not be for them and that is ok. I then comment on the things I enjoy about Disney. I find it a place to enjoy my family as the whole place and experience is about family. There is something for everyone.
To reply to your friends I would say: Yes it can be commercial, but you can enjoy Disney from a low to a high level of commercial. For example you can bring in your own food. Your local movie theater wont let you bring in your own food and drink unless you sneak it in. You dont have buy anything extra if you dont want to.
It is very nice to know there are people out there who value their family time and traditions at Disney. We have quite a few friends who happen to be big Disney people too. So hang in there and remember there are fellow Disney loving people out there.