I don't understand the reasoning. If Ukraine isn't openly acknowledging the attack doesn't it mean that it's respecting the orcs' "red line" of not attacking what they consider Russia?
It is interesting that Russia aren't accusing them of attacking. That's a bigger deal to me...
It makes sense though, there's no benefit in accusing Ukraine in this, otherwise it means 2 things:
- anti air defense didn't work
- panic between civilians in Crimea (more so than now people already leaving their holidays)
I don't think red lines exist. Maybe for using western supplied munitions.