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.