Any true conspiracy fan knows that the whole "it was faked" thing is bull. You can't fake something that involves thousands of people working on such a massive project. Someone would have talked. They went to the moon alright.
The "faked" story was made up to throw people off the real truth... that while on the moon they found evidence of another civilisation. Depending on who you believe, it was either ruins with no sign of life in the last few thousand years, or that they actually met aliens... who warned them not to return.
Now, whichever of those is true, supposedly Armstrong and Aldrin had no idea about this until they got there (some think NASA may have suspected but not told them). So it's understandable that he would withdraw and not want to talk about it after such a shock.
Whatever really happened up there, they guy was a true pioneer. RIP indeed.