Anti-Israel, not (as) anti-Judaism. Saudi Arabia and Israel have a rough history. I know plenty of Jews who safely do business in the KSA. That said, they tend to stay within the larger cities of Riyadh and the more-liberal Jeddah.
In other words, money and business >> beliefs.
I think you are kidding yourself if you think religion doesn't play a major part in Israel's relations with the rest of the Mideast, on both sides.
And elsewhere it's a complicated issue: Anti-Semites use that claim (anti-Israel, not anti-Jewish) as cover for and a dog-whistle for acting and talking against Jewish people; on the other hand. people criticizing Israel's behavior have been unfairly accused of being anti-Semitic. It's often very hard to separate the two motives based on objective fact. (And to make it more complex, anti-Semitic race nationalists, including at least some Nazis, have supported Israel because it fits their concept of national racial purity - 'Israel for Jews, the country I live in for <their racial self-identification>'.)
Israel and KSA both benefit from people thinking they hate one another. But they don't.
The world is just full of contradictions with regards to what is common public knowledge and actual reality.
I would agree they're not "friendly", but I didn't use that word.