A fetus is a person. It has a heart that beats and it has human DNA.* I am not a huge supporter of total bans on abortion, but from a moral standpoint, it should be counted as a human life, regardless if the abortion was necessary or not.
* = after a certain amount of weeks, generally some time after abortions usually take place
Human DNA is obtained at fertilization. Heartbeats occur less than five weeks later. Abortions always happen after the former by definition, and very often (perhaps a majority of the time) after the latter.
I can respect pacifism when it is actually opposed to all forms of violence, though I myself do not hold that position. As to the question, no, the invasion of Iraq in 2003 was a bad idea.