Depends on how you want to split it and people were very split and very scared at the time. Back then you could ask the average person on the street if they favored going into Iraq and the frequent response would be something along the lines of: I want to support the troops. It wasn't overwhelming support, it was fear for our children and anger and sorrow for our dead.
It was also a very heady time. I remember walking into a bar prior to the run up and a KBR employee was handing out flutes of Dom and wearing a platinum grill (really weird thing to see on a middle aged white dude). Asked him what he really thought of it and he asked me why I hated Capitalism. Told him I had nothing against it, but invading Iraq just seemed like a poor decision, an unnecessary expenditure. Then he asked me why I hated the troops. GO TO 10. No real discussion, no real discourse, just: Why do you hate America? You don't? Well then shut up and get on the bus.
On top of all of that you had Ashcroft and Rumsfeld making these really weird statements during press conferences about "sedition" and "I can't say that subversive sources can't be classified as enemy combatants, you tell me". The right knew it was hard trolling, the left went nuts and we still occasionally hear about "Bush Derangement Syndrome".
And at the time some wondered why the middle wouldn't go past "I support the troops"?