1. Just because it's old news, doesn't mean it isn't news for a lot of people.
2. My point still stands: some conspiracy theories do turn out to be true (do a search for "conspiracy theories that were proven true"), so wholesale calling conspiracy theorists nut jobs, or saying they are "tinfoil hat" wearers is unbelievably shortsighted.
The problem with the rdrand conspiracy theory isn't that it's unreasonable to believe the NSA is trying to backdoor something; it's that it's a stupid backdoor, and that the logic that delivers you to the conclusion that it's a backdoor also concludes that everything else must be a backdoor.
But the topic here is about maintaining a secure system. You must prove beyond a reasonable doubt that every element is either secure or allowed to be owned by your antagonist. Technically no one should have ever trusted something that can not be observed (and it sounds like the people responsible didn't.)
If you chose to trust intel for no good reason, then you must now untrust them given that there is a reason. As a company they would be idiots to introduce such a thing. But if every US company can clearly be threatened with even worse outcomes into going against its own market interests then such an argument does not apply.
As a side note, I do think there was already plenty of evidence that the US was actively forcing companies to do the NSA's bidding. The encryption export laws were largely designed to keep everyone who makes encryption products perpetually afraid of losing all their right to export anything mostly by "governmental discretion" on handling the companies inevitable 'incidents' of support talking to the wrong person about how RSA worked.
Don't marginalize me, bro.
I don't deny that some people do actually have paranoid delusions. But there's a big difference between a paranoid delusion and a (conspiracy) theory. The point I'm trying to make is that in light of recent conspiracies, we have to cut the conspiracy theorists some slack.
As to whether you're right or not, I don't know. But please figure out a less lazy way of getting your point across. The whole "tinfoil hat" argument is a fallacy used to marginalize people and shut them up without actually providing any evidence. And if you have evidence, then you don't need it.