I understood them as representing humanities greed. All the races stand in for some aspect of humanity. Our violence, our suspicion, our logic, our greed, etc...
Some people did make comparisons to Jewish stereotypes and while there are a few I don't think it's too strong. Klingon culture has flavours of Samurai in it, but it doesn't make them stand ins for Japanese.
Stingrays have been around for ages, I have to imagine there are more sophisticated versions. We know ICE is using apps developed by Palantir. Usually "fear mongering" only applies to unreasonable fears.
If I were going to one of these, I'd leave my phone at home, or keep it in a Faraday bag.