While it’s very reasonable to ask questions about opinions public figures have expressed publicly, I think it was unfair not to warn her in advance. I don’t believe Kellie Harrington has a prejudiced bone in her body, but she wears her heart on her sleeve and she’s not the first person to react to something she’d seen on social media in a way she mightn’t have if she’d had more time and her statement after it was good.
Equally I believe if he’d pursued a line of questioning like that with Johnny sexton he’d never have worked again.