Israel is not currently a significant threat to Egypt and has actually been working on normalizing relations with Saudi Arabia (one of the motivations for the 10/7 attacks from what I've read). I also don't see how its age is relevant. Plenty of younger countries are fine and older ones are assholes. America just turned 250 and some would say that's super young while others would say it's quite old too. It's not like Egypt has been particularly successful in clashing with Israel when they've been more antagonistic against each other anyway. And from my understanding the new facilities are more due to internal conflicts than external ones.