It certainly doesn't threaten it
And why should the exercise of self-determination by any other nation threaten, or "trump" as you put it, our national safety (sic)? Perhaps you are suggesting that the exercise of self-determination in the United States somehow threatens our own national security, for that, after all, is the next step. If we can get by without self-determination abroad, perhaps we can do without it at home, as well.
Again, Clinton did not invade Iraq. True, he presided over an air campaign against it, and as you note, he signed the Iraq Liberation Act of 1998 (PL 105-338):
It should be the policy of the United States to support efforts to remove the regime headed by Saddam Hussein from power in Iraq and to promote the emergence of a democratic government to replace that regime.
The act is described in theOnline journal:
... promoted in Congress by Woolsey, Clarridge, and now-Deputy National Security Advisor for Counter-terrorism Wayne Downing. The act (a piece of bombastic anti-Saddam propaganda full of historical falsehoods) passed Congress and was signed by Clinton, with scant attention from the public at large.
It is probably accurate to state that Clinton, like almost everyone else, was fooled by the relentless disinformation campaign designed to demonize Saddam Hussein and Iraq. As I have illustrated elsewhere, our intelligence agencies were hoodwinked into believing that Iraq was a real threat:
"Iraq and Saddam Hussein are the next target. We're starting now to build him up as the big villain. It will take some time, but in the end, there's no doubt it'll work."
[...]
The Mossad had all but saturated the intelligence field with information regarding the evil intentions of Saddam the Terrible.
Finally, you asked about the self-determination. I direct your attention to Resolution 47/130 from the United Nations 92nd plenary meeting of 18 December 1992, which reads (in part):
1. Reiterates that, by virtue of the principle of equal rights and self-determination of peoples enshrined in the Charter of the United Nations, all peoples have the right, freely and without external interference, to determine their political status and to pursue their economic, social and cultural development and that every State has the duty to respect that right in accordance with the provisions of the Charter;
5. Urges all States to respect the principle of non-interference in the internal affairs of States and the sovereign right of peoples to determine their political, economic and social system;
6. Strongly appeals to all States to refrain from financing or providing, directly or indirectly, any other form of overt or covert support for political parties or groups and from taking actions to undermine the electoral processes in any country;
7. Condemns any act of armed aggression or threat or use of force against peoples, their elected Governments or their legitimate leaders;
That's sacred enough for me. What about you, Ed?
S