Outright war with whom? There is an ongoing war in Yemen for 7 or 8 years now. This hijacking is horrible for the people directly involved... in terms of politics in the 'region' it's a nothing burger.Yemen is 1000 miles from Sharm and 800 miles from Marsa Alam. This hijacking may be interesting in terms of potential to draw Yemen into an outright war but irrelevant with respect to diving in Egypt.
I know US news hardly ever covers anything outside the US so I reckon people don't realise that that localized wars and armed conflict unfortunately go on all the time in the world... it just never gets covered on Fox News, NBC, CNN, Alex Jones news channel. But every time they do cover something, they'll make it seem like WW3 is about to break out any day now. Meanwhile, drug problems, gun violence and other domestic problems kill people all the time... just saying.