One candidate recognizes the threat of Islam.
The other does not.
Simple as that.
The Number 1 threat to the western world...and the entire world for that matter, is islamic terrorism.
This is followed closely by the Number 2 threat....those who are in complete denial of islamic terrorism; their heads in the sands of denial and fingers pointing at anything else other than islamic terrorism.
This election draws the lines of difference between the two candidates.
Nailed it.