Made public the ongoing relationship between Israel and various Islamic governments.

While I cannot recommend the New York Times as a reliable source, I present this link as an example of the kind of reporting done at the time.

The conflict between Israel and its neighbors serves as a perennial bogeyman narrative to promote and enforce oppressive policies upon innocent populations. Trump, unlike any president before him, that I can tell, successfully cracked the veil and made public information documented in less publicized investigative journalism as well as document leaks. While we have little to show for it as yet, I think that action may have significant long-term impacts on the region.