Howdy, Not many people know or have even heard who Umar was. Well, here is a good educational video with an explanation. Enjoy. Looking forward your comments.
Seeing that the Bible was written in the 680s-690s it was very easy for the committee to toss in Umar in the book of Daniel and make it seem like it was an ancient prophecy. It was a good con job.
I thought everyone knew who Omar was. Have you read the Treaty of Omar? Daniel AKA Dan'el is a much older Assyrian poem borrowed by the Hebrews.
You must not have read the Treaty.. He guaranteed religious freedom and invited the Jews to return to Jerusalem.