> Before Snowden, a lot of nasty stuff that we now take for granted the intelligence community does, was seen as "tin foil hat."
This is true, but using it as a justification for "And therefore, my theory about what the intelligence community is doing is correct and does not need evidence" is a non sequitur fallacy that has become depressingly common in recent years. You still need evidence for individual allegations.
To show you what I mean, suppose I were to say, "The NSA has a constellation of mind-control satellites built with help from the lizard men!", and then responded to the deserved skepticism with "A lot of things that used to be tinfoil hat theories we now know to be true thanks to Snowden, so this is too!". That's obviously fallacious reasoning, but it's exactly what people are doing when they toss around allegations of backdoors with no proof. Again: there's no shortcut around the need for evidence.
> After Snowden, I no longer doubt the possibility of any realistically imaginable attack ie, assume that if they have the physical ability to do it, you should assume they do it and are not stopped by any ethical concerns.
I agree completely, but that's not what I, or the person I replied to, was talking about. The issue I was addressing in my comment was whether their backdoors are being built with the knowledge and cooperation of the vendors, which is very much unknown. Attacks like taps on cables are orthogonal to what I was saying.