I'm not sure why you believe this is strictly a Christian issue. In reality, it's a human issue. Jews have infiltrated and subverted every human institution. Unless you inherently believe Christians are not humans or Christians are inherently superior to all other humans, the finger point specifically at Christian institutions, while ignoring all others, is very strange.
The bible itself speaks of bad trees (family lines) and tares and chaff and so on. There will be many people who claim one thing and are another. This includes false prophets. The Christian church is wherever your worship God. For Jesus it was homes and hillside, while whipping and chasing people away from temples. It's the corrupt churches which teach Jesus' teaching is wrong and therefore must only be learned in their institutions. And, of course, claiming only their institution is the true church in spite of no such thing ever existing.
At the end of the day, humans are corruptible. All human institutions can therefore become corrupt. The flaw isn't the institution, it's the human. We are made in his image, but not as perfect beings.
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