you bring up a really good point and that is God's sovereignty...using both the evil and the good to accomplish his plans in the world yet I can see why people object to the term "necessary evil" with regards to the holocaust. i consider a necessary evil something minor like a shot maybe or a diet but not when millions of people are murdered.
It may have been a "necessary evil" to save the world from itself down the line...
>> I consider a necessary evil something minor like a shot maybe or a diet but not when millions of people are murdered.<<
Your faith in the love and power of God, in the face of evil is only as strong as your ability to comprehend that God would permit such evil. I hope and am confident that your faith is stronger than you portray it to be.