I have a last name which is Jewish but I am not Jewish, ancestor was adopted by step-dad Jew after his mum died. My friend has always said that I look Jewish and that if I moved to a Jewish dominated suburb I would have life easy because they look after their own. I didn't believe him until my wife was in the hospital for our daughter's birth and one of the nurses was Jewish and she thought we were Jewish and gave us excellent extra attention.
I am typical white guy and could pass as Jew. My wife's first name is also Jewish, different spelling, but nowhere in her family is Jew. She has curly black hair too so could fit in easily.
What could I do to profit/benefit from infiltrating the Jews? What would I have to do to be accepted? I draw the line at fucking/killing children. How do I not get found out? What would they do to me if they found out I was faking it? Could I take them down, expose them?
No, you can't better expose them by pretending you are one of them, they are out in the open saying the things they want to do to the goyim but no one cares or believes it and that's our problem! Our problem is not in finding their secrets!
You will never of course pass for the top echelons, there are special blood lines for that sort of thing, secular assimilated jews are not even considered jews by the fanatics! And even if you make it and pass as one, you will only be peasant jew, which is not really special.
Karma has it ways, you cannot cheat, you need to fight them, don't let your brain play mind games on you convincing you that you want to take them down by joining, while you are just running away from the fight. At your luck you may end up being attacked by non jews for being a jew while not gaining anything from your tribe :D :D