I'm not asking this for instruction. I'm asking on behalf of your own statement not being a fiat ("Because I said so") statement.
But it isn’t “because I said so”. It is because I am Jewish and understand Jewish concepts. You created a hypothetical which runs contrary to basic Jewish thought. You have proven that. There is no burden of proof for me to teach you what Judaism says and does and why you are wrong because my point was simply that your words speak for themselves.
If I said to you “here’s a hypothetical – 2+2 equals cow” you have the right to say “this shows you don’t understand how math works.” There is no burden on you then to teach math. Anyone who is annoyed that you don’t teach me math and therefore assumes your point is “right” (though there is no point to your claim – it was a flawed hypothetical) can feel free to be equally as ignorant. I am dismissing your hypothetical automatically.
Or try "imagine what Christianity would be like if Jesus never existed" -- that is an impossible hypothetical. Does it need to be explained why?
Well, I admit it is hilarious. But you can learn a great deal about a culture's mentality from an accurate portrayal of the group of people involved. Or have the Japanese people never committed seppuku? While, yes there are inaccurate stereotypes, some cultural myths come from somewhere. Where does this come from?
So you are content learning about Japanese culture from the fact that some people have killed themselves in certain contexts. Nice generalizing. Some Jews have, worn vests. Therefore we can learn the Judaism requires vests? Feel free to learn about Judaism from a play or a movie. Then I’ll learn all about dogs from Benji or Rolf on the Muppet show. Dogs talk, right?
Well, we have kosher law that separates milk from meat,
IIRC you said “They build walls to split their cities into sacred and profane” so now talking about different categories of food is shifting the goal posts.
blood in all cases from the flesh of an animal, animals into categories of cloven or uncloven, cud-chewing and un(?)cud-chewing, shellfish and other fish, prey birds and stuff like chicken, and so on. There are rules about mixing fabrics. There are rules about how you can associate with Gentiles. There are rules about people you can touch (such as not touching the sick or lepers). Let's watch the scene.
So nothing about walls and sacred and profane. The fact that there are rules for food and interpersonal contact (in Judaism, I can touch a non-Jewish man much more readily than a Jewish woman) has nothing to do with what you claimed. If you want to shift again and discuss intermarriage, that’s separate (and nothing to do with sacred and profane). You really should start by accepting your ignorance and asking respectful questions instead of citing movies as your proof.
it gives very clear insight into the mentality of a Jew, as does their reaction when Jesus is talking about how a prophet is not welcome in his own land, and talks about how only a Syrian was healed.
Well, it does reinforce those looking to criticize and hate ("the mentality of a Jew" wonderful). Of course, people who choose to learn have a different reaction.
There are about ten or so walls in Jerusalem.
Every house has a wall, too. What does this have to do with sacred and profane? And Montreal has walls also. And what about Wall Street? And there are no walls past which only rabbis and priests can go. You conflate a whole lot.
There are symbolic walls around kosher diet and meat/milk, from separate dishes to each separate fridges
Separate fridges? No, not really. At least not for most of the year. And, my clothes which make me not naked are a symbolic wall also, right? What about my car? If anything is symbolic then everything can be symbolic. People in general have walls around everything they do. By writing in English you are erecting a wall against non-English readers. Wall builder!
Moses beat one of the overseers to death, if memory serves me.
Ah, so killing a man who is beating another is murder. Got it.
Psalm 118:22-24, the same thing Jesus quotes about the cornerstone. We have a preconceived notion, all of us, about what something we idealize should look like. When it doesn't fit some of our standards, we decide it must not be so.
No, that’s your interpretation of the verse. You start outside of Judaism and you wonder why I point out that you end outside of Judaism.
The Messiah on the other hand, is whoever God chose,
And God was clear about who that would be. Not Jesus.
and rejecting him on the basis that he's an outsider is not a good choice.
It is actually the best choice.
The test of the annointed or chosen of God, is that God (not us) chooses him. That he fulfills the prophecies.
And those two things go hand in hand. When they don’t, expect rejection.