* I admit that there have been individuals in both the civilian government and in Starfleet, that have put their own selfish needs before those of others,
That's what the Federation says. But imagine you're an alien looking at the Federation from the outside -- why would you believe that? Doesn't it look like the Federation is engaged in all sorts of underhanded activities, and if the get caught they put the blame on some admiral for acting on his own.
And for that matter, were the events in Insurrection the result of rogue elements? I thought the Admiral had approval from the Federation Council. Was Picard a rogue when he conquered Tezwa? And what about all of Section 31's shenanigans?
So the Federation says. Why should the Breen or Gorn believe that?
Are the Romulans actually expansionist? Sure, they have a long-standing conflict with the Klingons, but can you blame them -- I mean, the Federation and Klingons are allies and they still fight. The Romulans supported one faction in the Klingon Civil War, but is that so wrong -- the other side was led by a Chancellor installed by the Federation, and if not for the Prime Directive, Starfleet would've aided Gowron directly.
The Romulans did try to conquer their ancestral homeworld, but only after a high ranking Vulcan infiltrated Romulan society and tried to subvert the government. Other than that, their relations with the Federation have been antagonistic but not expansionist.
Who else have the Romulans fought since they ended their period of isolation (very expansionistic policy there).
And speaking of the Tomed Incident, doesn't that rather undermine the Federation's claim to nobility in combating this alleged Romulan expansionism?
You're assuming that they view the Federation the same way you do.If the Tholians wanted peace and cared about others like most Federation citizens do, they wouldn't have joined a group with less-than-reputable governments like the Romulan Star Empire, and the Gorn should have joined the Federation that saved their people from near extinction. Either way you put it, the Federation is the way to go.
* Any alien sentient being can get to know the inner workings of the Federation and Starfleet, through diplomacy.
Isn't that a bit like saying no reasonable person could ever possibly dislike you once they get to know you?
I don't mean that as an insult to you -- it's just a fact of life that no matter how kind and generous and helpful you try to be, somebody, somewhere, out there, will end up not liking you, even if they get to know you.
The same principle is true of international relations. The Federation can be as good as it wants, but that doesn't mean everyone's going to think they're decent folks -- even if they aren't bad guys, they may still walk away thinking the Federation is full of it. Certainly Odo, for instance, seems to be no fan of the UFP after getting to know it very well during his time on DS9. Is it really so hard to imagine that a small, democratic world that doesn't want to be homogenized by the Federation and doesn't like the way the UFP keeps expanding might view the Federation's relationships with, say, the Klingon Empire in a much less generous light?