The Church 'handball' on the line hit his shoulder, definitely not a penalty. Agreed about Suarez, he takes all the stick from defenders but getting his goal and 3 points is a good enough prize.
Church deserved to go, taking the tackle on its merits. It was two-footed, and he lunged in. However, the one you mentioned also deserved a red, as did their number 11 just seconds before Church did go...