Because corruption, sin and evil cannot be totally eradicated until after the battle of Gog and Magog (Rev 20). Some things are indeed hard to understand. Why would God want to release Satan when he was already locked up?
I don't believe it too highly speculative at all in believing the
reason for satan to be released after Christs'
"millennium reign" when "Priests of God and Yeshua Messiah, shall "reign with Him a 1,000 years?"
Is that
during those 1,000 years (which btw
could be referred to as
"an everlasting", in and of itself!....
again, not too highly speculative at all), which
shall BE reigned with an rod of iron?
TEACHING will be the
main item of this exercise! So to speak. (God's Loving Kindness which endures forever on display again)
The
short season of "the satan/s"
shall SERVE as a
proof of how well those teachings
take root and grow! (I say "grow" instead of "grew", as
this has not occurred.....
YET! :))