Ash-Shaykh Bin Baaz, may Allah have mercy upon him, was aksed the following question:
The Question: The one who praises Ahlul Bid’ah and extols them is he to be added to them?
The Answer: “Yes, there is no doubt ,the one who praises them and extols them then he is a caller for them, he calls to them, this person is from their callers, we ask Allah for salvation”
The Source of Reference: On the Footnote of The book “Sharh Fadal al-Islam” ,page 16, print Sayd al-Fawaa’id, also the Book “ar-Radd alaa al-Mukaalif” ,page 7.