Stupid hypocritical fans. It's like McCann and Ellsbury didn't leave their homegrown teams for more money.
Every team has their hypocritical fans, or their jerks, or their racist fans, etc. It would be interesting to see if the ratio of good/bad fans changes at all over larger sample sizes. Philadelphia, for example, hardly has a monopoly on fans-who-are-jerks, but it may have a disproportionate amount of them. Or maybe not!