Imagine if you had a kid, Dwoing: wouldn't you let him go out and play, even though you knew he could get hurt, get dirty etc? Would you not let him make friends, even if you knew some of them will dissapoint him? will you ask him to love you or will you give him enough freedome so that he feels your love and return it back?
It's very easy. Free will is the most incredible gift of all and in my book, the greatest proof of love that God made to human kind
.