Because they're mindless, soulless idiots who hate Russia and the Russian people because they were told to hate them by their "benevolent" media overlords.
They're also too stupid to realize that the Russian government and the Russian people are two separate entities, and the actions of one don't necessarily follow the morals and beliefs of the other.
And they're also privileged fucks who don't realize how privileged they are to live in a country where protesting the government is a protected right, and so are blind to the fact that other places in the world have harsh penalties for protesting. You know, for the soys who are going to whine about how "the Russian people could just protest their government if they disagree with what they're doing."