His name is Alessandro Del Piero.
If that was being twisted to Alessandro Del Totti,then perhaps you could argue.But judging a peron's support to the club on the basis of what nickname someone used for him,is irrational.
Yes a person can be a Juve fan and call him Sandro.He could be called Miss Fairy Shoed Alessandra for all i care.
Your logic is silly to say the least.