Don't bang yourself against the wall until you bleed. That is taking a trigger out on yourself and that's the last thing you should be doing. Also, when something you see reminds you of something that upsets you, it's an opportunity for you to acknowledge the trigger, but to also see that this gift is NOT the same actual danger that caused you to feel this way about fire and fireworks. In reality this is actually something that is basically harmless and instead is just a way to make this santa toy have something extra and creative and that it isn't going to harm you. Actually, you could use this to desensitize yourself where you set a new pathway that helps you slowly regain yourself away from being sensitive to all reminders.

Also, it's important that you step back from immediately deciding this person who actually took the time to even send you a gift only did so to upset you. There is a greater chance this individual happened to come across this Santa and chose it as a gift simply because it's different and not the "typical" boring gift.