Hestia hadn't bothered to disguise herself, she lived in Hogsmeade, and she'd been sacked from the Ministry. She was going to try to keep her temper though, who knew how many Death Eaters could be in this crowd, anyway. But it was harder when she realized just how ridiculous everything that came out of the Minister's mouth was. This was BULLSHIT, Hestia wanted to scream at everyone who was just standing there idly by and listening. This was completely off, this wasn't right. Muggles weren't dangerous, they certainly weren't more dangerous than Wizards.
Even though she wanted to scream, she didn't, but the unhappiness on her face was obviously apparent. She was annoyed and she was angry that she lived in a world where their Minister could say things like this.