How come people think my marriage will be torn up apart because people claim I'm obsessed with another girl?

For some reason these people in my town thinks that my marriage to my vietnamese fiancee from vietnam will be torn apart because they claim that I'm obsessed with a youtube celebrity. They said you never stop talking about this vietnamese girl from youtube named Cathy Nguyen and they said your wife will get annoyed and feel unloved. They said how can you expected to be married when your obsessed with Cathy and is always on youtube watching cathy's videos of her singing. I just admire cathy's spectacular voice and I am not obsessed with Cathy, I think cathy is just really cute. I'm pretty sure my wife won't mind me watching cathy's videos but I'm a computer guy, I love staying on the computer a lot so I can't really help it. I have a laptop though. They said they can predict a divorce from 5 years down the road from now. Why do they think my marriage will be torn apart because of this ????