Because CAIR is Hamas and Hamas is CAIR.
CAIR Leader Mimics Hamas in Calling for Israel’s Destruction
The slogan, “From the river to the sea, Palestine will be free,” can be heard regularly from the shores of the Gaza Strip, emanating from members of terrorist groups, including Hamas and Palestinian Islamic Jihad. The river represents the Jordan River, and the sea is the Mediterranean – both sides of Israel. Essentially, this means the destruction of Israel.
Khaled Meshaal, the global head of Hamas, stated something similar, when he made his historic visit to Gaza this month. He said, “Palestine is ours from the river to the sea and from the south to the north.” Just one week previous to that, the leader of another Islamist group, Cyrus McGoldrick, repeated the slogan on Facebook and Twitter. Except he did not state it from the Middle East, he made it from the United States.