If one views foreign policy with the simplistic and myopic view that "supporting the troops means bringing them home" then one might see some thoughtful insight contained within.
As for a war started on lies, well if you could handle the truth (that our NATIONAL SECURITY, meaning petroleum supplies cannot be held hostage by dictators engaged in unending regional conquest) then the real reasons would be emphasized.
On the point, I'll assume you mean that since we didn't find any WMD that meant you were lied to. Your ignorance should not be mistaken for their falsehoods.
We had a deal with the Royal Family of Saud to protect them from aggressors, this deal was put in place in 1973, their end of that bargain was the outrght guarantee of US financial dominance of the global economy which resulted in all our financial prosperity since then.
We had a debt to pay and we paid it. US causalties in the 4 figure range was very cheap.