Huh? I never suggested that. Those are your words.
13000 died this weekend in tsunamis.
Yeah, this too would be small potatoes compared to a 400 meter asteroid impacting earth. Even with warning. The events you mentioned are not even in the same ball park. An asteroid of that size would be off the scale. Trust me.
Nope. That's not that big, and it also depends on the angle of impact. a 400meter asteroid hitting mid ocean would cause a title wave but other than that the affects would be short lived. Hit on land it would throw a lot of stuff into the atmosphere, but probably not as much as Mt. St. Helens, and certainly not as much as Krakatoa.