I agree, but luckily my terrier apparently doesn't give a poo about fireworks. Probably nobody jad thrown fireworks at him yet. My inlaws' country dog (also a fox terrier mix with the same temperament) growls at people, especially teens, smelling of powder and barks at fireworks and motorbikes. Good thing he's not a Malinois to nip those teens and chase the motorbikes. So it'a more of a nature vs. nurture thing.
dog behavior is strictly a reflection of their owner