1) Yes, By not creating humanity.
So you seem to be saying God's alleged power is limited - he couldn't have created a non-falling humanity. Why not? A workman who can only work in a shoddy and defective manner isn't much of a workman, is he?
Don't know
Yet you
do claim to know that God could only have prevented a "fall" by not creating humanity in the first place. Strange.
But since he did, man could also have prevented it by not falling
Except that this so-called "fall" was, in the tale, the awareness of good and evil via sampling some stray fruit. However, since eating said fruit conferred the knowledge of good and evil, there can have been no such knowledge prior to actually eating the fruit. There was no prior awareness of any "fall". It's a simple point of logic, Vlad.
3) He provided Jesus to allow the relationship to be restored.
Why not simply restore said relationships without the torture and temporary death thing?