I won't say what I think of the Pope, except that this and his other remarks will flame anti-Catholic sentiments.
Good summary as to why Catholics are NOT Christians:
http://www.born-again-christian.info/catholics.htm
There are some very good and well meaning people inside the Catholic and Mormon churches. But just click the links below and the Bible is very clear on these issues.
We fought wars to get away from Papists and kings. Very odd seeing one speak before our Congress.
David and Goliath.