I have huge sympathy for her regarding Stephen Lawrence the treatment by Police at the time was disgusting and hopefully it seems at least the Police have at least tried to move forward these days.
As tragic the situation is and the effect it must have had on Doreen must be immense, I still don't think it quite gives her the right to have a 'free pass' on any subject, without being challenged, her comments must be incredibly insulting for firefighters who dealt with the Grenfell tragedy, perhaps already feeling guilty about not saving lives and probably still have nightmares about Grenfell tower until this day and beyond. Let alone being told you deliberately didn't save lives based on skin colour, that's disgusting in itself.
I do however, see the angle you're coming from JoGills.