Oh he's definitely entitled to. Just as Albion fans might feel entitled to think he's very silly to be snippy towards a large group of people, who might feel less well disposed towards Sussex CCC as a result (or who already pay his wages!). Which would make it a very silly thing to say IMHO.
No biggie but just a bit silly given his position.
Perhaps it was just a gag directed at his mates?
Any Sussex fan who goes Mavis Riley about it needs their bumps felt.