Ash-Shaykh, al-‘Allaamah (Dr.) Rabee’ bin Haadee al-Madkhalee - حفظه الله تعالى - said in his "Adh-Dharee’ah illa Bayaani Maqaasid Kitaabish-Sharee’ah" (2/101):
“This way is from the ways & techniques of the people of bid’a & fitan, it is a must that they conceal themselves behind a personality from the prominent, well-known personalities. So the Qadariyyah hid behind Al-Hasan [Al-Basree], & they wrote, spread & authored treatises falsely ascribing the bid’ah of denying Al-Qadar (Allaah's Pre-Decree) to Al-Hasan & he was not from them.
And the Khawaarij used to conceal (themselves) behind another tremendous personality, Aboo ash-Sha’thaa’a Jaabir bin Zayd , one of the major students of Ibn ‘Abbaas, (from) the major Fuqahaa’. The Khawaarij disguised themselves with him.
So this is from the tricks of the people of bid’a, because their bid’a does not spread if they don’t conceal themselves behind the a’immah of Islaam. And many of the people do this. The Qutbiyyah would not have spread except by concealing themselves behind Ibn Taymiyyah & Ibnul-Qayyim, & Ibn Baaz, Al-Albaanee & Ibn ‘Uthaymeen, & other than them from the respected personalities that are accepted by the people of the world. So they say: ‘we are students of Ibn Baaz, we are upon the manhaj of the Salaf, & from the students of Al-Albaanee, we are students of Ibn ‘Uthaymeen’, & these people pretend that those Imaams are with them. So their tricks fool many of the youth who love knowledge, & love the ‘Ulamaa’, & love Islaam & love the Haqq, but the tricks of those people deceive many of the people, so they fall into their snare.”
* Rendered into English by Aboo Sufyaan 'Uthmaan Beecher