To discredit the Revelation they run into the concluding warning not to “take away from the scroll of prophecy”.
The joyful conclusion for us believers is to “take from the water of life without cost”. We are thirsty and we wish to!
Yes, they ignore the warning about not adding or subtracting one jot or tittle. I believe in and look forward to the Blessed Hope, and believe that birth pangs are all around us. The rebirth of Israel was a big one.