Before denominations existed, Christians were of one mind. That is what we need to return to. It was only when (we) non-Jewish were added to the body, that all sorts of paganism was introduced into Christianity, thereby bringing division and dissension. Four centuries later, denominations started fragmenting this body of believers and, today, there are some 38,000 sects around the world, including that of Rome and Constantinople.
We should become one again.