How were American soldiers treated after the Vietnam war?
In general, they were treated as outcasts and demonized by many whom they encountered back here in "the world."
Are the soldiers that are in Iraq being treated better from the Americans than the soldiers that came home during the Vietnam war?
Any returning servicemember is and was treated better than a Vietnam returnee. With the one exception of Confederate soldiers returning home (the south) after the US War of the Rebellion (American Civil War/US Civil War/War between the states). But then technically, those Rebels/Confederates weren't US servicemen either. Union/Federal/Yankees/Blue Coats/Northerners/etc. were actually US servicemen.