No, being followed by car and then on foot by a stranger can never be perceived as a deadly threat. There has to be more, something a reasonable person would believe indicates a deadly threat. Following doesn’t even come close.
Nice try sneaking the gun in your narrative but Zimmerman was carrying concealed and there is no evidence whatsoever that the gun was an issue prior to the scuffle. Furthermore there is plenty of evidence that the gun only became an issue after the fight exposed it.
Gee, you left out the part about the gun...no surprise.
You only have GZ's word for when TM first saw the gun. And we know that GZ is a liar and a sneak...a liar and a sneak who has a violent history.
I understand though why you ignore these things.