Actual quotes:

"I say now, that the Greeks [i.e., the Eastern Orthodox] are not heretics. They have the same sacraments we have, and the same faith in Christ. Only they do not believe in the papacy. They are better Christians than the papists, and far more accurate in doctrine."

“They [the Eastern Christians] are the best Christians next to us and are better than the Papists.”

...and yet he didn't join them.