Of course, you can back it up to Xavier for having him there in the first place. He couldn't possibly think that keeping him caged & muzzled up was gonna help. That's what his father did. Clearly didn't help.
X-Factor used him as a prisoner and kept him confined outside of missions. Once again, go crazy, escape, and tear into everyone
Then once again, in HOX Xavier puts him in solitary confinement and says he can earn redemption later But when he gets out of there, he'll be even more crazy.
Imprisoning Sabretooth is played-out. lol It never works & only insures he be even more bloodthirsty when he gets loose.
New ideas, Marvel. Please. Unless he's gone permanently this time.