Isn't it a bit disingenuous to omit the fact that both Iraq and Syria have areas experiencing active warfare? The bombing campaign is not occurring in a vacuum, is targeted at people engaged in warfare against us or our allies, and those conflicts have killed far more people than just the bombing campaign - including via the use of chemical weapons.
I'm not trying to justify civilian casualties, the ongoing drone attacks on multiple continents, or even answer whether we should be involved in these conflicts - I just think the situation is more nuanced than "the US has bombed/killed 50,000 people in Syria and Iraq".
But what you seem to ignore is that the active warfare in both countries was caused by us. And in Libya too.
Think about that. Those countries are now a mess because of "regime change".
Even outside of internal pressures, geopolitics are at play as well - Iran and Russia are playing "the great game" as much as the US/NATO are in the fight against terrorism.
The demonstrations in Syria were not spontaneous. They were engineered. If you have time, read the email exchanges between the US ambassador to Syria and H. Clinton.
Regarding Iran and Russia playing "the great game", they're supporting the legitimate govt of that country. Without their support, Assad would have been dead years ago, and Syria would have been in worse shape than it is now.
You might start by reading https://wikileaks.org/clinton-emails/emailid/18328
Edit: Added WikiLeaks links
Iran is definitely playing geopolitics when they arm Houthis (fighting the internationally recognized government) with anti ship missiles in the Strait of Hormuz. Were they also not arming the Iraqi insurgents/sending military forces over the border during the height of the conflict in Iraq? How about Russia in Ukraine (are the "little green men" freedom fighters or rebels?)? Russia has more than just the support of a government in mind when it supports Syria.
I'm not saying one side is right or wrong - just that none of these actions happen in a vacuum.
And you're correct, because they don't.
My original point in all of this is that we're creating a refugees crisis, but refusing to take them in. That, in my opinion, is just evil.
It's all geopolitics...
http://wikileaks.cabledrum.net/cable/2006/12/06DAMASCUS5399....
We basically took the most and arguably the most prosperous country in Africa (Libya) and ruined it. Now we're refusing to take in those fleeing from our mess. We did the same thing in Iraq and Syria.
But it seems we're not done yet. Iran is next.
Bit is anybody protesting war against countries that can do us no harm? Nah! It makes for good war video games and Hollywood war movies.