What is the Muslim Brotherhood?

From CBN News, Tuesday, February 15, 2011:

Walid Shoebat, who was once a member of the Muslim Brotherhood, has authored many books about Islam and the Middle East, including his most recent, God's War on Terror: Islam, Prophecy, and the Bible.

Shoebat was born in Bethlehem to a Palestinian family and was once a PLO terrorist. Now, as a Christian, he works tireless to educate people about the realities of the radical Islamic agenda.

Shoebat appeared on The 700 Club, Monday, Feb. 14, to talk about the Muslim Brotherhood, recent events in Egypt, and how the upheaval will affect Christians living in the region. Click play to watch.

Many foreign policy experts believe that the radical organization known as the Muslim Brotherhood will gain great influence with a change of government in Egypt.
This secretive group has had many Western observers uneasy for years. The Brotherhood was founded in 1928 in Egypt, with the goal of spreading Islamic sharia law worldwide and uniting all Muslim nations into one Islamic super-state.
Before Osama bin Laden formed al Qaeda, he belonged to the Muslim Brotherhood. So did his top deputy, Ayman al-Zawahiri and 9/11 mastermind Khalid Sheikh Mohammed.
The terror group Hamas also identifies itself as the Muslim Brotherhood's Palestinian branch.
Why is there such a draw to the Brotherhood? the group's official motto may tell the story. It reads:

Allah is our objective.
The prophet is our leader.
Qur'an is our law.
Jihad is our way.
Dying in the way of Allah is our highest hope.

The Brotherhood was eventually banned in Egypt, but for the past several decades has worked behind the scenes to the point where it's now considered the most influential Islamist organization in the world, with chapters in more than 100 countries.
The group's immediate goal is an Islamic state in Egypt and an end to that country's peace treaty with Israel.
What is the danger if the United States and other nations do not understand what the Muslim Brotherhood is all about?