The Wikipedia article? No, I don't think it particularly relevant, I tend to be fussy about my sources. There were many articles detailing the return of fighters at the time, and I'm from the area that sent the most (which is probably why I thought there were more) and know that a lot returned. Shamima Begum's treatment was and is to 'set an example', I don't actually agree she should be refused return (though there may of course be things known to the authorities that are not divulged to the likes of me).
I can reassure you that I most certainly do know the truth in my heart, I have a horrible feeling however that you do not. I therefore think there's little point in continuing this exchange, you have made your position extremely clear - and I think it has been very illuminating in light of the topic of this thread. So I thank you for that, at least.