It might not have been orchestrated but it was heavily funded by the US. I seem to remember watching a video where a Ukrainian girl tries to emotionally explain why people should support Maidan. The video had almost 10 million views. I did some researching and it turns out the video was funded by a US senator. Then there's Pierre Omidyar funding opposition groups through USAID and who knows what kind of other funding Maidan has received.
I don't think it's a conspiracy that US successfully managed to get Ukraine out of Russia's hands. A good thing, some might say.
Oh sure, the US tends to support groups that go with its agenda. It helps pro-democracy (and pro-capitalist, pro-free trade etc.) groups. I suppose they could've helped them, I have no idea how that'd work in practice though.
However, I think it's nonsense to suggest it's some massive US/EU plot to get revenge on Russia. It was spontaneous and reacting to something completely unrelated to Snowden or Syria.
I don't think it's a conspiracy that US successfully managed to get Ukraine out of Russia's hands. A good thing, some might say.