Is It Permissible To Pray Behind Ghair Muqalids?

If the Imam who is from the Wahabi, Salafiyya etc. sect does not do anything contrary to the validity of Solat of the Ahlus Sunnah Wal Jamaah- e.g. perform Masah on regular socks instead of using Khuf (leather-waterproof socks), the congregational Solat behind him will be valid.