Is it safe and helpful to channel Allen Dulles with the proposed questions?

It is safe and helpful and also quite important because he is a key figure in all that has happened. The safety will come from your being a non-threat on its face because of the source of your information. It will be no different than anyone writing a book of speculations based on his involvement with the intelligence apparatus and the many threads interweaving the CIA with the politics of those times. And so your coming forward with channeled information will not be viewed as threatening because it will not be believed by most people. It is not hard physical evidence and so a non-concern to the cabal at this point in time. It will be quite important to have this on record for a future eventuality. When looking back, people will see you were achieving what you set out to do, to uncover truths and going to the sources and getting accurate information. This is important groundwork to be laid.