No, not directed at you. I could fathom your sarcasm, and responded in like. I to am sickened by this constant reference to the next dooms day event.
However, let it be noted that although I find this constant reference to our undoing bothersome it must be added that incoming space debris could be our undoing. We may not get as much time to deflect that incoming object as we would like. As for the tsunami from space. I suspect you are well aware that this reference is used only to describe the manner of which a debris field might impact Earth. Like a tsunami.
The problem with this subject is that it is driven by emotive fear not facts.
This Earth and this solar system could and will pass through that non event and unless you were not told you would never know. Its probably better that way.