This is so ridiculous.
First of all, I don't think anyone has said "I don't like rappers, they carry guns". However some rappers are illegal things. Frankly, I would respect anyone as a person less if they are into illegal activities. However, Pacino carried an unregistered gun 40 years ago. Now, as far as I know he is a law abiding citizen. 40 years ago, I would have felt a little disrespect towards him as an individual, although I will always respect him as an actor no matter what he does.
Again, I end with...this is completely ridiculos.