Of course it's sad that this baby died. I can feel sympathy for the mother, it is a horrible thing for any mother to go through once, let alone three times.
However, she didn't seek to return after her 1st or 2nd child died and the only reason she wanted home recently was because of the fact that the caliphate failed. I don't think the fact she was pregnant, or had a baby, or even now that her son has very sadly died, should mean she gets treated differently to anyone else who has done the same thing as she has. Having a baby or being pregnant should not gain her advantage over anyone else in the same situation.
That said, I'm not sure stripping her of her citizenship was the right thing, even though the fact she still doesn't really renounce what IS stood for or condemn their barbaric and inhuman treatment of so many people does make her a difficult person to feel any real sympathy for (in the wider sense). I just think we've pushed our problem onto another country, however much I would prefer people who hold her beliefs did not set foot in this country. Although, I would not advocate putting British service personnel at risk to get her out- she would have to go through the usual channels of getting to a consulate and seeking assistance (and there isn't one in the camp or Syria, for that matter). If she returned, she would have to be investigated and potentially prosecuted for any crimes she has committed. And then watched very carefully on release to make sure she did not pose any threat.
However, where's the concern for the many, many other babies and children who have died in the refugee camps and as a result of the war in the region? Where is the sorrow for their mothers, if they still live? Not many are advocating doing anything meaningful to help those innocent children, mothers or families. A whiff of hypocrisy, I think.
What about all people slaughtered, tortured and raped by IS? Or all the children left orphaned and traumatised? Nope, not so much handwringing going on for them either.