Turk,
You fail to understand that your bird in the original sentence has nothing to do with the 100 kts tailwind, it's irrelevant ... If you hit the ground it is relevant since you will hit it faster or slower but in the same airmass it just doesn't matter because the same windspeed applies to any aircraft/bird/ufo in the same airmass.
If you fly 300 kts in zero wind and hit a bird flying 10 kts it's the same as if you fly 300 kts in 100 kts wind (from any direction you like) and hit a bird flying 10 kts.
If you still don't get it at least stop bit**ing and read from any other source you may like.