Who Is The Restrainer?

Bible scholars have told us for years that the Restrainer found in 2 Thessalonians 2 is God's Spirit. Why? Why isn't it Michael, the Great Prince who protects the people of Israel the Restrainer? What is being restrained? Why is the restraint removed? When does this occur? All of this matters and it will become apparent as we get closer to the mid-point of the final seven years. Let's discuss!