I think Chinese dragon is before the western Dragon.

Western dragon is so much different than the Chinese dragon. By what logic western dragon = chinese dragon and that western dragon is western's 忌讳 = Chinese dragon is western's 忌讳? Since you said so yourself that dragon is nothing too serious, then why the do the east needs to care so much west's 忌讳 while the west doesn't care about eastern 忌讳?