anon1m0us: There is no stira (contradiction). There are many reasons why the holocaust happened. What Rav Miller zt”l, the Satmar Rebbe zt”l, the Chazon Ish zt”l, Rav Henkin zt”l, etc. all said is 100% correct.
The Gemora also gives many reasons why the second Bais Hamikdash was destroyed. One gemora says because the women wore too much cosmetics, another says sinas chinum, and others have other reasons. They are all correct reasons.