It's always fun to see Speedy outwit Sylvester, but by 1965 the Looney Tunes had long since passed their prime. In this case, the slobbering cat tries to ruin Cinco de Mayo but the quick mouse foils his plans. I noticed that in one scene Speedy sings "Cielito lindo", a traditional Mexican song whose title means "lovely sweet one" (appropriate for the scene in which Speedy sings it). Yes, Speedy Gonzales and Pepe Le Pew are the only Looney Tunes who consistently try to be romantic with women; Bugs, Daffy and the rest are rarely in relationships with anyone. Anyway, it's an OK cartoon but no match for Speedy's earlier work.
The idea of an American cat trying to keep Mexican mice away from cheese always comes across as an inadvertent representation of immigration issues.