--another collision we collide in yellow letters it says I collided with so n so my fault
This is a common misconception. Those messages don't have anything to do with "fault". "You have collided" simply means there was a collision detected on your screen, on your computer two planes intersected with each other. "XY has collided" simply means there was a collision on his screen.
None of that has anything to do with 'who's fault it was.
in real life 2 planes collide
In real life, yes. In AH, sometimes not. Just look at the wo pictures I posted, that's an 'asymetric collision'.
This is why there are two separate messages. Sometimes just you collide. Sometimes just him. Sometimes you both do.
in the game my opinion is if 2 planes collide no matter who is at fault both planes should go down
If both player have a collision on their screen, both take damage. Sometimes one plane with a collision just does not go down because the damage wasn't critical. Sometimes it goes down but you won't note it because you died first. Also, enemy planes have the nasty habit of pulling the trigger when getting close...
And again, the program doesn't care 'who's fault' it is.