They say there is proof.
When we ask for it they go to islamic sources instead of showing the physical proof from either Nasa or any other trusted source of intel..
NASA is hardly trustworthy. Anybody that believes any government source is truly gullible.
Well....
NASA has done an excellent job with it's planetary robotic exploration work. The STS program, the space shuttle, that's arguable. In general, NASA is flanked on the left by research departments at universities and private, and it is flanked on the right by an array of industries. Those produce spacecraft, instrumentation, computer and control systems, rocket motors and so forth.
I'm not sure how words and phrases like "trustworthy" apply to such complex groupings. Within NASA, there are divisions by subject matter and by geographical location.
Do I trust the sort-of librarians in Houston whose job is to take care of the lunar rocks and material returned by the Apollo missions?
Sure.
Etc.