There is nothing in that video that suggests that Glen Beck's event will backfire on Israel. His event is all pro-Israel.
I do not like Beck's official Mormon affiliation, but he sounds more and more like a pro-Israel evangelical. From everything I have heard him say over many months, I believe he is very close to salvation. Let's pray for him. For sure, he is a seeker.
"Lord, please grant that Glen Beck find the Truth, your Son, and deliver him from error. In Jesus name. Amen."