They are at war therefore it is an attack not a “terrorist attack”. I am sure you can debate whether or not an attack during war time could be terrorist.
A terrorist attack is usually designed to cause psychological trauma and involves injuring civilian population. This was clearly an attack on the economy and I don’t agree with the Russian media that this is a terrorist attack. So I think the quotations make sense as it is a sign of sarcasm poking fun at Russia’s reporting.
Translation: US automakers are worried about Chinese imports servicing a sector they have abandoned.