2 different things:
1) Admin lied and twisted intelligence to convince senators to vote for authorization for this use of force that they otherwise would not have.
2) Questions and criticisms of how that war was conducted. (ie..not enough troops, too many troops, need to leave, need to stay, etc..etc)
The 2nd...is a legitimate discourse and disagreement over how things were done.
The first..is an "accusation"..not a question.