Representative democracy doesn't mean that every possible policy could be enacted by some realistic configuration of elected representatives, even if any particular policy is supported by a majority of the electorate.
that is only true if you flatten your system to two parties.
Again with the "you". "We" did not flatten anything into anything; we were born into an unfair and broken system that we have no power to change.
This is a philosophical disagreement, not an issue of language.
You can become politically active and try to convince others if you don't like current status quo, inaction is also a choice.
Unless you think US isn't a democratic country but authoritarian one(either oligarchy, technocracy or whatever - does not matter) then it is definitely not a philosophical disagreement, but lack of responsibility and wishful thinking.
Why? I never consented to be a part of the system, don't agree with it, and in practice can do nothing to change it. Saying I'm responsible for it because I happened to be arbitrarily born with a particular citizenship is meaningless.
> In democratic system...
There is no reason why I, an unrelated individual, should have to ascribe to the ideals espoused by proponents of the system imposed on me without my consent.
You live in it, and it is part of your reality so your only choices are to emigrate somewhere undemocratic, or be part of it.
It is pure denial of reality otherwise.
People are pointing out the hypocrisy of demonising Iranians for the actions of their government while insisting that Americans are unwilling victims of theirs.