The Sitra Achra [Dark Side] seems to be part and parcel of the religious world.  The reason I think is some idea that Rav Nahman brings סביב רשעים יתהלכון [psalms 77]"The wicked go round about". That is,--where ever there is holines the Dark Side tries to get in. This makes it hard for me to find anywhere I can sit and learn. To some degree I feel that if people had listened to the Gra and Rav Shach this problem would not be here. But also I realize that people will often choose evil even when great tzadikim like the Gra warn correctly.