... and of course you don't bother to include the next line -
[4:90] Exempted are those who join people with whom you have signed a peace treaty, and those who come to you wishing not to fight you, nor fight their relatives.
...or perhaps a more understandable translation -
[5:101] O you who believe, do not ask about matters which, if revealed to you prematurely, would hurt you. If you ask about them in light of the Quran, they will become obvious to you.
"It’s true; the Qur’an is so incomprehensible..."
LOL - You seem to be very good at "comprehending" it when it suits YOUR purposes, and I dare say the author of the biography you tout would hopefully claim some comprehension of the book written by his subject.
Forget it. I told you, I am not interested in jousting koranic verses. You would feel much happier in the company of an imam, I am sure; whiling away the hours, telling each other what a wonderful, peace loving religion islam is. (And how misunderstood all muslims are.)