Obama campaigned in 2008 on the notion that he was going to be the anti-Bush. He was going to do things differently. He was going to do the opposite of what Bush did during his eight years. He was going to end the wars and bring the troops home. He was going to engage the world diplomatically and peacefully.
LOL. How many of you here bought that pile of horse manure? Raise your hands.
Obama never really ran as a pure anti-war candidate. The very fact he advocated for an Afghanistan surge while running (and followed through) showed that. He is in fact ending the wars and bringing the troops home. It's not as fast as many would like, but he is doing it. People who believed he was going to be completely anti-war were mistaken before he even got a single delegate. The Republicans still can't decide between the Neocons' world police force and the Tea Party's isolationism. Obama's pretty moderate in his use of the military but he's absolutely less likely to use the military over McCain or Romney.
Obama's drawing a line in the sand for Syria. We're not trumping up shaky intel and declaring Syria a threat to the region. He's doing this not because he wants to invade Syria, but because he doesn't want to make the country even more of a humanitarian crisis that will require us to intervene. It's a way to hopefully make Syrian think twice against using chemical weapons.
As for Libya, Obama got UN support and actually got France and Britain to do most of the military action. The Libyan people are actually very happy we got involved and view the US in a very positive way. I'm not sure how you're thinking that Libyan wishes we never got involved or that somehow we made it worse for them.
If you only define Presidents as isolationists or hawks, then yeah, Obama and Bush are both hawks, as well as Romney, McCain, SoS Clinton, Pres. Clinton, HW Bush, etc. To lump them together completely ignores the differences between their beliefs in world policy.