This is a common reply to any evidence given about false doctrines taught by the Witnesses.
We all know that every religion has its faults and scandals. So why do we tolerate these imperfections in those faiths and not in the Witnesses?
My answer: Because other faiths admit that they are basing their doctrines on faith alone or tradition. And, a lot of other faiths allow dissention and discussion among their followers. Therefore, I would caution any potential convert to really check out whether questioning and discussion is encouraged in the new group. Because, face it, every belief system is based on one of two unprovable doctrines - that God exists or that God does not exist.