Lots of Bible teachers have been found to be false. That doesn't make the Bible false nor does it implicate others.
Each of us has been charged to watch for the Lord's coming. Each of us will be held accountable for that job.
Luke 1:20 And now you will be silent and not able to speak until the day this happens, because you did not believe my words, which will come true at their appointed time.”
These prophecies have an appointed time to come true.
Luke 5:35 But the time will come when the bridegroom will be taken from them; in those days they will fast.”
This was one of those appointed times.
Luke 12:42 The Lord answered, “Who then is the faithful and wise manager, whom the master puts in charge of his servants to give them their food allowance at the proper time?
There is a proper time to teach certain subjects including eschatology, fulfilled prophecies and signs of the time.