It's not the Marathon though, it's the whole "Everyone must conflate the Marathon tragedy with the Red Sox" crap. Please. It's like how everyone said you had to root for the Yankees in the World Series after 9/11, unless you lived in Arizona....otherwise you were unpatriotic.
I'm ok with it. If god forbid something happened in Baltimore, and the Orioles became an important part of the healing in the community, I'd expect many tributes a year later.
It doesn't ALWAYS have to be about hating the Red Sox or Yankees....Some things are just more important. If Having Big Papi and his wife and kids at the finish line makes people feel better, I don't understand why anyone would have an issue with that.