they funded the rebels after the war started yes, that does not mean they started the war. and your second point makes no sense, if euromaidan was a coup done by obama then why did he refuse to send arms to the ukrainians after russia invaded. trump on the other hand sent billions of dollars worth of military equipment to the ukrainians, kept u.s troops in syria and launched airstrikes against the assad government despite his repeated promises to get the u.s out.
United States