Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you.
The assumption on our part that most people who claim to be born-again are actually saved leads to a great deal of fretting and spiritual expenditure over brethren which do not exist. It leads to distracted sheep trying to carnally herd goats while the rest of the true sheep languish, and it leads to ravenous wolves finding easy prey among the sheep and goats alike in the false name of love and acceptance.
We have incurred the judgement of God and done ourselves a great disservice by never assuming that many a false disciple, and even Judas himself at times, lurks in almost every context. But if His true sheep were truly being fed and warned, then the goats would either convert or be driven away by the Word going forth; and the wolves would be more easily spotted. As it stands today, the wolves rule, the goats are kept warm, and the sheep have been scattered.
We have been rent by the swine, for we have needlessly cast our pearls before them. Great is the fall of this house.