Is it safe and helpful to do an interview for the website with Vince Foster in the light?

This is not as politically charged as you fear. This is indeed a manipulation but not a direct conscious and willful one by the political parties involved. It was done through mind control manipulation to take a weak link and deal with it through eliminating him, so this was in service to the Extraterrestrial Alliance, not to the president and his circle of compatriots. Your list of questions is ancient history to the Cabal at this point. They would view you as being so far behind the curve as to be of no real concern regardless of what might be unearthed. As always, you will be safeguarded to not overstep reasonable bounds of safety and prudence.