Why did they vote him in the first place? And it these protesters are the ones who didn't actually vote him, why don't they accept the will of the majority? The government isn't committing crimes against humanity like mass deportations or other last century's madnesses, so it's just how democracy works.
Being able to protest the government you don't like is also how democracy works. Unless you do any disturbance you're perfectly allowed to express your opinion even if in the minority.