LOL. Quite funny how humans make and twist logics. How are you sure that names like Muhammad, Jesus, Islam and Christian are non offensive?
To some Islam's, the name Christian is offensive;
To some Christians, the name Islam is offensive;
To Hitler descendants both Muhammad and Jesus could be offensive to them. What would have been the best is a world of total freedom, where anyone does what they think is good to them.
If you've read your history, you'd know by now that there's no Hitler descendants anymore or a direct one, they know the sins and atrocities associated with the last name and so they are either not Hitler anymore or they've castrated themselves to break the bloodline associated to them. Also, how can Jesus be offensive to someone that bears the Hitler surname? Most of the Nazi Germany at that time was of Catholic faith so there's no way that it can ever be offensive.