Simply put: Boldin is our property. Thats how contracts work. If he was a 3 year veteran who did this, would we even be discussing this? No, not at all.
Boldin signed with us to play, he chose to retire...as the rules state, he can play with us since we own his rights. OR, we can trade him, which we are seemingly facilitating. What is wrong with that? The Bills oppressing him would be if Boldin said "hey I want to come back", and the Bills responded by saying "We don't want you, so sit at home, K Bye"