Given Boldin's speed and agility, you would be giving the Jets DBs way too much credit to claim they intended to hit Boldin and injure him on that play. That would mean they actually have the ability to execute the hit as planned. Boldin appeared to be running and jumping, not just jumping.
It was definitely illegal, but I do not think it was dirty. The illegal hit drove Boldin's helmet into the other defender (that is assuming Boldin was not unconscious after the first hit to be driven).
According to the announcers in the game tonight, the Cardinals site is apparently reporting Boldin is good to go. No apparent injury.