Everybody has a passion. It could be a person, or possibly a thing. It's different for everyone. My passion is professional wrestling. Many may see that as hobby or as an "obsession", but it's anything but. I am passionate for professional wrestling. It goes far beyond fandom for me. I want to a living out of it. Not as a wrestler, but as a writer for WWE. I, personally, have never been ridiculed for being a wrestling fan or having a passion for the product, but I definitely know of people that have. It's pathetic, I know, but it happens. One would think those kind of ignorant people are far and few between in 2014, and they are, but they're still out there and it's a shame that some have to deal with them. What they might not realize, however, is that whoever mocks them for having passion for wrestling (or anything that's looked down upon for that matter) doesn't have a passion themselves.
It's like bullying. It's often said that bullies only bully others because they themselves feel inferior and need to make other people that way in order to fill that void. This is pretty similar. You won't discover what your passion is from the day you're born. There's no one point you have a revelation as to what you're passion is. For some, it takes longer than others, but you have to keep in mind that you'll find it eventually. It just takes time, and more importantly, patience. It isn't uncommon for people without a passion to pick on people who do have one, regardless of how "stupid" it may seem.