Why does that bother you so much though ?
They are allowed to think what they want, it is understandable not to want a player from your biggest rivals, especially one bombed out for being shit and a player that we frequently laughed at and called shit when he played for said rivals.
So to welcome him to our club would then be major case hypocritism on our behalf, hell that is nearly as bad as the Pep knows best comments, used when we are not allowed to question anything that is happening to the team in any way.
I don't want him at our club, I don't think he is very good, he is majorly overpriced for what he can deliver, I also admit that I don't want an ex rag shit house that blatantly supports them, playing for our club but that is the final reason, the final 10% of the argument, the other parts supercede the fact he is an ex-rag.