It's not the first sight of danger, it's an ongoing sight of danger, and an attack at the highest level of our government, which means Hogwarts is a likely next step. Again, no dictionary needed, it'd be precautionary to remove people from a logical next attack.
Then snapping at a brilliant young woman, on having her own opinion, because it might have consequences, is a bit hypocritical don't you think? Since taking the other stance, has consequences as well?