What significance do events like this have according to the Bible?
What you have identified their could fit quite a number of fundamentalist religions beliefs R&R not only the Jehovah`s Witnesses as your probably fully aware.
So what I`m pointing out here is that JW`s don`t have an exclusive insight or revelation from GOD/ Jehovah in interpreting world events as fulfillment of Bible prophecy in our day.
Something that probably escapes the average Jehovah`s Witness is that their are many ways to "witness" it doesn`t have to be only or exclusively door to door .