If you really want to test you, just go close to a synagogue and walk close to a jew when it comes out or walk in (if ever allowed? not sure)
Hmm
This makes sense in a way. In my life, during my adolescence, I hung out with a group of friends very often (I still do). I loved them all and liked them all. Except for one, and I couldn't figure out why I didn't like him. He was part of the group of friends, why would he bother me so much? Some time after my soul dedication, I found out that this guy was a Jew, which is why I hated him so much. Today, fortunately, he has left our group of friends.
However, this does not mean that it is advisable to stand in the doorway of a synagogue to see what you feel when a Jew passes by. Many things can also be the result of suggestion and getting close to that Jewish scum is only negative.
I have never seen a Jew say anything spontaneously positive for the Gods. My (Jewish) Martial Arts Master (one of my Grand Master's assistants) apparently seems very interested in Gentile spirituality, meditation and Yoga, etc. But it is something so superficial that when you hear her speak you understand very well that she has no sense of spirituality at all, it is as if she were external to it, even though looking at it, she does understand that it is a good thing. And regarding the Gods, she has no sense of closeness, attraction or connection with them, she simply knows the mythology and iconography very well, but nothing more.
Jews are not of Satan, if you are of Satan it is not possible that you are a Jew. This is enough even without going to dirty yourself near synagogues or Jewish crowds (also because some Gentiles are so submissive to Christian thought forms that if you are new you cannot understand when you feel antipathy towards a Jew and when you simply feel disgust for the Christian energies in people's auras). Meditate and many things will come by themselves.
When I was just starting out in Satanism, I looked for any evidence to figure out whether or not I was Jewish. If I were to try to figure it out today, I wouldn't need to analyze features, draw family trees, share experiences with the Gods, etc. I would just need to listen to my soul: I feel all the chakras and their extensions, where they don't have extensions I don't feel extensions, even though I can direct energy to any point in my body, feeling a chakra is different from feeling energy accumulating in one point.
And this is true for the major chakras and their extensions as well as for each individual minor chakra. I feel emotions in the front of my throat, I feel bonds in the front of my chest, I feel sexual desires in the front extension of the sacral chakra. And so on. I meditate and I feel that it is effective and that my chakra is strengthening, etc. I do the opening meditations (like for the hand chakras and soul wings or third eye, pineal gland, etc.) and indeed the symptoms are identical to those described on JoS, and so on.
My natural tendency is to good, honesty, compassion and I can't help it, which is the opposite of a Jew who has to force himself not to give in to his natural evil tendencies. The Gods fascinate me, I love them and I feel a deep connection with my Guardian and a Father/Son relationship with Satan to the point that I would do anything for him and that I really care about receiving his love and coming to him.
These are all signs that a soul is Gentile and not Jewish: for this reason I say that our Brother AFODO is right, understanding your soul is the most effective way to determine the presence of Jewishness. And this comes very well with more meditation and less initial paranoia. Really no need for testing in synagogues.
