Questions on Ivan Groznyi

After reading the first-hand account of Heinrich von Staden, here are the questions I have:

  1. How often did Ivan IV ride out with the Oprichniki?
  2. Why did he allow for the burning of churches if he was a holy man?
  3. Why were all the places he slept all burned afterward?
  4. On pg. 153 it mentions “Aleksei [Basmanov] and his own son [Fedor], with whom the Grand Prince indulged in lewdness were killed.”  What exactly does von Staden mean by “lewdness?”  
Read the rest here