Where did President Obama accuse anyone of claiming "God for our side"? I see no one being accused of such in what was quoted. That is a conservative and false accusation.
It does remind me of a sentence from a song recorded by Johnny Cash - "Man in Black":
"And, I wear it for the thousands who have died,
Believin' that the Lord was on their side"
I kindly suggest that you read the quote in the OP, Pastor Mitchell, and answer my question - what person or what group are you accusing President Obama of having accused of claiming "God for our side"?