We are not arguing anything about the Church Committee other than the result of the release of that report degraded the CIA's intelligence gathering ability.
Any restrictions on the intelligence community whatsoever degrades their intelligence gathering ability. That's not really meaningful without knowing the tradeoff.
Now we have Diane Feinstein, who signed off on enhanced interrogation techniques, preparing to release a 499 page report (written by democratic staffers) based on a 6,000 page report completed in 2012. And we have a White House on one side who says the support the release of this document yet publicly is warning Americans overseas (in particular members of the diplomatic corps) that there will be backlash from this release.
I don't find this argument compelling at all. Where were these people worrying about the backlash when we were actually doing the torturing? Nowhere. They were supporting it then, as now.
I find it funny that these people are simultaneously arguing that what the CIA did was the right thing, the legal thing, and something they should be commended for, while simultaneously arguing that if people learn what they did the international condemnation and revulsion will be so extreme that it will lead to riots and death. If what they did was so good and necessary, why the worry?
If it were up to me, I would handle this internally and not make this a political statement. Drag the former heads of the CIA, Attorney generals, etc. into congress and have them answer to these charges. Did the CIA go too far beyond what was authorized? If so, prosecution could be warranted. Do we need to release a propaganda tool to the public in order for this to happen? I say no.
I think its extremely valuable to let Americans know what was done by our services in their name. The biggest reason is that I hope they recoil in horror from it, thus making it harder to do in the future. If it is 'handled internally' there will be few to zero consequences, which would basically equate to a green light to do this again.