You can substitute any nation where you have the word Saudi! Nations do not have friends! They might have shared interests if they do they might be allies for some time period. The shared interests change the need for being allies change and might roll over all the way into enemies.
Anthropomorphizing the relations beween nations blurs thinking!
Nations are the artificial creations of men and as such do not human attributes. They are amoral entities possessing neither emotions or moral sentiments but interests in safety and expansion.