ANSWER:

No problem.

However, I doubt that the knowledge you learn from him would be authentic if he is indulged in such innovations. 

QUESTION: The imam of my mosque always do congregational dua after each fard salah. I know its bidah. Each week he does tafsir on Friday night. After tafseer he does congregational dua and before it durood e Ibrahim in congregation. Without doing durood e Ibrahim with them can i join him in congregational dua only after the tafseer or will this be a bidah too?