Milky Way to collide with Andromeda Galaxy

[arjan de lumens]

I merely asserted one possibility which I think has some relevency, however I can't pretend to know as fact and neither can you or nutball.

The problem with your initial assertion is that the available evidence doesn't support it. The particular GRB that nutball dug up, while being one of the most powerful ever seen, wasn't anywhere close to powerful enough to be able to flash-burn the Earth from outside the galaxy.