... there's always room for a conspiracy theory like the NWO controlling both the US and German governments and then some to suppress the truth.
The problem is that people do tend to work together to advance their own interests, and do so in secret to reduce opposition from others. That is the definition of conspiracy. Such activity is not purely mythical or rare - it's pervasive, inherent to the human condition.
Governments, and groups within and/or associated with them, have a long track record of doing such things, getting away with them for years, and having (some of) them come to light decades later. It's always the same story: "Oh, yes, back in the bad old days there were such things going on. But that stuff isn't done any more. (And anybody who claims such stuff is happening now is a nutcase, so pay no attention to him.)"
Then, maybe 30 or 40 years later what was going on THIS time comes to light, and the story repeats. Or somebody blows the whistle while it's still going on and presents evidence (often at great cost to himself), and then it's "That's just a rogue person/agency/group. We're bringing them to heel." or "It's a corrupt administration. Replace the head of state with a different one (maybe from the other major party but keep the same two parties in power) and it's all taken care of." Yeah, right.
Snowden revelations, ECHELON, Watergate, COINTELPRO, Pentagon Papers, Hanford Experiment, Tuskegee Experiment, Factor 8, Abscam, Ng Lap Seng, Iran-Contra, MK-Ultra, Operations MOCKINGBIRD, PHOENIX, and CHAOS, ... I could go on for pages, and that's just big, US (sometimes with allies), stuff that came to light in MY lifetime.
The government has whole agencies tasked with conspiring in secret to collect information and/or intervene to interfere with any opposition to its interests. The US has "Black Budgets" to unauditably fund such activity, and the Department of Defense, alone, spends an estimated $50 BILLION a year on its portion of this (as of 2009).
With their activities occurring in secret, there is much temptation to, and limited checks on, also targeting the biggest risk to the people currently in power in any government: The citizens of the country.
"Spook" agencies have a number of techniques to keep these conspiracies hidden, and one that has come to light (and is appropos) is the "Second Cover". This consists of spreading TWO cover stories: The first is plausible. The second is tinfoil-hat fruitcake material, lightly hidden. Anybody who figures out the first cover IS a cover and starts digging finds the second cover. Then they usually either give up (rather than dig for a third level) or you get new material for the tabloids, and another boost for the "conspiracy theories are ALL crazy talk" meme. (And it also helps that occasionally they DO try out the odd piece of mystic bulls**t, just to see if any of it, like some herbal medicine, DOES work.)
I generally assume (as did The Framers) that this sort of creeping (or galloping) encroachment is inherent in governments, is going on (and having new project starts) all the time, we usually can't tell, through the fog of misdirection, what's going on NOW, and the job of the people, like a farmer clearing weeds and trimming orchard trees, is to continually cut it back to levels that don't ruin our own lives and livelihoods.