Abandoning the People of Innovation

Ibn Qudaamah al-Maqdisee says in his book Lum'ah al-I'tiqaad:

And from the Sunnah is abandoning the People of Bid'ah, opposing them, leaving arguing and disputing in the religion, avoiding looking into the books of bid'ah and listening to their speech, and every newly-invented matter into the religion is a bid'ah.