The Russians are telling the Americans to mind their own business. I hope they listen...sometimes it's better to simply let sleeping dogs lie. Iraq on a grander scale anyone?
In other words, kiss Putin's arse a bit more. These are the times that the west must have as much information as possible about what Ivan, err, Vlad is up to.
You must remember this has been going on for decades, they send their spy planes, we the west send up our spy planes, there's no precedent set by a 135 being in the area. Should the US get its hackles up because a bear circled Guam a few months back or the bears that fly up and down the west coast of the US? No, send something pointy up to have a look and be done with it assuming all are playing their roles appropriately.
Business as usual old boy. The only real noteworthy part of this is what spooked the crew to escape into Sweedish airspace.