You're implying US is a better country when it comes to human rights, but I don't see US defending his human rights. In fact, it's breaking many international laws trying to get him.
Also, I have to wonder what would've happened if there was any other weaker Russian president in place. I never liked Putin, but seeing how so many "democratic" countries were so quick to follow US' commands, and break international laws for US, just sickened me.
There's a difference between a partner and an ally, and a master. You can still stand up to your allies or partners at any time, if you disagree with their actions.