False. JW have erred in interpreting the year of the great tribulation but not in interpreting prophecy or scriptures relating to the time of the end and the overall meaning of the Bible and the meaning of each scripture in the Bible such as hell, mortality of the soul, Jesus is not God, etc. —Too many to mention. The Bible educational work of JW is the greatest in human history. As Jesus predicted that his followers would do work greater than his proving JW have the backing of Jesus.
Surely you are joking? Why would Jesus back a lie, or a predicted date for Armageddon that failed...more than once? Why would Jesus support disfellowshipping, a wickedness which fosters love among the greater number to grow cold? (Matt 24:12) Why would he support an earthly organization riddled with child abuse, lawyers and court cases?
Yes, surely you must joking. Please forgive me if I fell for the joke.
"On that day many will say to me, ‘Lord, Lord, didn’t we prophesy in your name, drive out demons in your name, and do many miracles in your name?’ 23 Then I will announce to them, ‘I never knew you. Depart from me, you lawbreakers!’" Matt 7:22-23