We are similar to them but not the same. They are called donmehs. These are the remnants of the followers of Sabbatei Zevi living in Turkey.
We accept the broad principles of Sabbatei Zevi. We both accept the Jewish Kabbalah, Judaism and Islam. But do not think he was the messiah nor do we accept necessarily what his enemies write about him. They generally make similar remarks about the Prophet Muhammed and even Jesus doesn't escape.
Some English but mostly in French.