Not after 12 years of sanctions it wasn’t. Did you notice how quickly it militarily collapsed during the invasion.
Why? Violating UN resolutions doesnt normally precipitate invasions. Ask Israel. Anyway it is for the UN to decide how to enforce its own resolutions not the President of the USA. Particularly a President who ignores international opinion as a matter of principal unless it suits his agenda to pretend otherwise.
How did Saddam violate 1441 exactly?
Saddam was a secularist, he suppressed Shia pilgrimages to Najaf and Kerbala. While Saddam Hussein’s Baath party ruthlessly persecuted the Muslim Brotherhood for the first 20 years of his rule, Hussein’s severely weakened status after his huge setback in 1991 led him to publicly embrace Islam as a means of strengthening his legitimacy, ie US Foreign Policy made Saddam less anti_Islamist than he would otherwise have been. See
usip.org/pubs/specialreports/sr108.html
Islam does not consider the non Islamic world to be infidels
islamonline.net/askaboutislam/display.asp?hquestionID=7602
Qur’an
does not instruct Muslims to kill non-believers to guarantee them a place in Heaven, as you have said. On the contrary, God commands the believers to invite others to His way in the most peaceful manner. In this call, the Muslims are commanded to appeal to their common sense and to their own faith in truth and justice. Most certainly God has categorically prohibited forcing anyone to accept Islam, let alone killing! The Qur’an says what means:
{Let there be no compulsion in religion. Truth stands out clear from error: whoever rejects evil and believes in God hath grasped the most trustworthy hand-hold, that never breaks. And God heareth and knoweth all things} (Al-Baqarah 2:256).
{Say: “The Truth is from your Lord.” Let him who will believe, and let him who will, reject [it]} (Al-Kahf 18:29).
{Goodness and evil can never be equal. Repel [evil] with good: then will he between whom and you was hatred become as it were your friend and intimate} (Fussilat 41:34).
{Invite [all] to the way of thy Lord with wisdom and beautiful preaching; and argue with them in ways that are best and most gracious: for thy Lord knoweth best, who have strayed from His path, and who receive guidance} (An-Nahl 16:125).
From these verses it is clear that anyone who uses force to convert a non-Muslim or harm any human being on that score, breaks the divine command; and such a person is not what a Muslim should be.