The Book of Daniel is one of the most contested writings in the Bible. Atheists understand the significance of Daniel and attack it with regularity.
Here’s a note on the Secular Web about Daniel:
“The prophecies of the Book of Daniel have fascinated readers and created controversy for the past two thousand years. Evangelical Christians believe that the prophet Daniel, an official in the courts of Near-Eastern emperors in the sixth century BC, foretold the future of the world from his own time to the end of the age. Actually, the book was written in Palestine in the mid-second century BC by an author who expected God to set up his everlasting kingdom in his own near future, as we read in the mainline commentaries and Bible dictionaries.
We pointed out in our last article that many atheists attack Daniel as being written centuries after King Nebuchadnezzar of Babylon and King Cyrus of Persia actually ruled. They know that a late dating of Daniel would bring Daniel’s visions and prophecies into question and would also cause problems with the New Testament texts where Jesus uses the term ‘Son of Man’ (from Daniel 7:13) for Himself.
I would have agreed with atheists 45 years ago when I was also an atheist. However, that was before I looked into the evidence for the historical accuracy of the Book of Daniel.