QUESTIONS SERIES: If it’s all God’s will then why do wars, crime, illness, etc. happen?

God doesn’t cause evil or evil things. Ultimately, evil comes from one of two sources: 1) the free will choices of people can cause evil; 2) the free will choice of the spiritually fallen angels and Satan himself (Eph.6:10-12).
So all is not God’s direct will. The willingness of God to create human beings as free creatures means that we are responsible for our choices. God knows what we will do but he doesn’t interfere with our freedom to choose good or even evil.