My theory is that something in there implicates mosad directly.

People need to understand that his generation are extremely on the greatest ally train to the point is religious heresy not to be.

If those files directly involve Israel I can see him and those close to him not wanting them release. The scandal of Israel blackmailing high profile people using minors would be earthshattering.

However, if that is the case, destroying them seems a much better solution or for some great minds, it could be used to blackmail Israel. That would be one interesting turnaround