Mate, if you feel like you can’t share your insights and be respected then you just need to recognise this isn’t you failing at being social, it’s simply that those people aren’t your tribe.

You don’t sound like a social idiot, just socially sensitive, which means you likely weren’t actually being obnoxious. Their reactions could have been anything. In my experience, most folk aren’t actually all that respectful of other religions symbols, so I think you were likely on the money in thinking they thought it was something more occult and not a Jewish symbol.

So don’t let this kind of thing cause you to second guess or try and conform to a certain type of of attitude. If this scenario should tell you anything, it should be that you need to be more unapologetically you, and ask more questions so that you aren’t guessing so much at the motivations and thoughts of those you interact with