Nobody elected her to set national policy on immigration, nor did the surviving family members of every other servicemember who has been killed elect her to be their spokeswoman.
She is entitled to her personal opinion, but it deserves to be given no more weight or consideration than anyone elses.
Nicely stated, sieur! Not a thing added or subtracted could possibly improve it.
Sometimes the grieving process can take many years and I have noticed that many who have lost loved ones who were prominent in the mass media forsake that process too soon. Instead of grieving they instead lose themselves in public behavior (affiliating themselves with causes, making strident, passionate statements about public policy, ideology, etc.) So it seems to me in the case of this poor woman.
Since the temporary ban and hold on immigration that the current administration has enacted is nothing that unusual, I question this woman's knowledge of history, the law, the Constitution or public policy. She is speaking from great ignorance and shooting from the hip. Making decisions about complicated issues using one's feelings is not wise, not very dignified and I would venture to guess, not very satisfying. She likely is inadvertently engaging in this sort of behavior because she is emotionally exhausted and terrified of facing the full emotional impact of her loss.
Temporary refuge from those feelings may be found in anger. Righteous outrage ( whether justifiable rationally or not) is at the very least, a much "safer" place to be emotionally than gnawing, aching remorse or loneliness.
In the parlance of psychology, she is stuck in the "bargaining"phase of the grieving process. That is when a surviving loved one convinces themselves that if only they take up the opinions, activities or beliefs of their lost loved one, that this will significantly reduce or even eliminate the terrible feelings of horror/loss/emptiness which resulted from their death.
That strategery (sic) seems very reasonable and would be a good option except for the fact that it doesn't work. It just doesn't work. The only way to deal once and for all with the emotions of loss which result from such a trauma, is to actually experience the feelings of loss full force - which is never very pleasant but for which there is no viable substitute.