Lol, this is such a classic right-wing trope to roll out when they can't quite grasp the nuances and complexities of an issue.
No one on the left is falling for her poor me story. We are simply able to see past the right-wing narrative the government are trying to enforce for what it really is, an attack on someone's human rights.
Begum may well be an evil terrorist monster, but she's never been tried so is not a criminal in the eyes of the law. She certainly appears to have been radicalised and groomed, which would make her a victim too.
The sensible, legal, just, moral thing to do is to try hear for her alleged crime(s) and punish her if found guilty. Simply stripping her of her citizenship is not only an appalling thing to do but sets a dangerous presedent. Today it's an alleged Islamic terrorist being stripped of their citizenship, tomorrow it's a young Irish boy/girl who expresses dissident republican views online, next month it's anyone who criticises the government. Either justice is blind and applied equally to all or it is not justice at all and just a tool of government control.
You might laugh at that and say don't be so ridiculous, that'll never happen, but fascism, authoritarianism, and totalitarianism don't just spring up one day with a grand gesture, they take hold gradually through the incessant and relentless erosion of rights and control over many years.
Only one side here are being taken in by a narrative and it's not the 'bleeding heart liberals'.