Doesn't matter who she is. She's not a judge and DOJ is not a part of the judicial branch. Only a judge can stay or overrule an EO. She was way out of line, by a mile, and she got fired for it.
Funny as well that when Obama unceremoniously fired James Mattis without even bothering to communicate his decision why, no eyebrows were raised and he wasn't called a 5yo. Mattis's fault? He didn't want us to bomb Iran.