Bitcoin fans are people realizing that Bitcoin's advantages can redress its disadvantages. While Bitcoin's problem still concerns them, they see its potential and learn how to get its fullest. In contrast, Bitcoin haters show very negative attitude towards Bitcoin, I mean, they see problems with Bitcoin more than the value it brings.
In my opinion, bankers or even those who work for those who are somewhat of a job, most of my friends also disagree with btc, because they say it is only to find money easily, so it makes all hardworking useless.
I think for those who don't like bitcoin just because it's easy to get coins there.