I saw a comment on Twitter this morning from some Syrian revolutionaries. They said that they consider themselves Syria’s link to the West, and that they reject any contact with Russia and Iran.
I don’t know how widespread that attitutde is among the Syrian revolutionaries; but if it is widespread, I think it will make it harder for them to improve the human rights situation in Syria. Human rights is a just cause, and gets a lot of support from people everywhere; but if the issue is seen as taking one side or another in international politics, that support will drop.
For example, the US opposes human rights movement in Bahrain and Saudi Arabia because the foreign policy establishment sees those movements – incorrectly – as linked to Iran. Russia and Iran do oppose the human rights movement in Syria, because they see it linked to the US. If it really is linked to the US, they will oppose it even more.
The difference between the US on the one hand, and Russia and Iran on the other, is that the latter restrict the human rights of their own citizens, while the US, aside from the occasional assassination, focuses its attack on human rights on the rest of the world, from Bahrain to Nicaragua to Honduras to …. well, you get the idea.
During the old Cold War, the US and the Soviet Union not only allied themselves with dictators, but encouraged those allies to be more repressive (e.g., in Chile for the US, Hungary for the Soviets). If a new Cold War escalates, that will happen again. The best way to get human rights is to be non-aligned.