"She isn't dangerous. She's a source and I can't reveal that." Maybe muggle journalists had different views and morals than wizarding ones. Either way, Demelza was sticking with the muggle view for now, to protect this girl.
"Well...I guess," she shrugged, furrowing her eyebrows. That made sense too. "But the whole reason she's on the run is because she became immune and disagrees and they can't let someone like her be free." She specifically didn't use the word 'you' because she didn't want it to seem like an accusation. This was all so confusing. Who was she supposed to believe in th end?