Contemporary Jihadi Salafis and their reliance on Ibn Taymiyyah

This is a useful article by an expert on Ibn Taymiyyah: he argues (and he has a book length study) among other things that 1) Ibn Taymiyyah never engaged in Takfir in the manner of contemporary Jihadi Salafis; 2) that the first reliance on Ibn Taymiyyah occurred long before Al-Faridah Al-Gha'ibah.