Halloween has come a long way from the pagan festival of Samhain, and the takeovers of Easter and Thanksgiving by the chocolate and retail industries has been a lot less politicized. We don't see it for holidays of other religions and regions as the full religious variant was never practised in the west, but my understanding is that e.g. the Haj is big business too - Saudi Arabia's biggest economic industry after oil and gas is Haj tourism.