Your thesis is basically: The medina is a bad idea because the people are making a Chilul Hashem.
With that thinking why did Yehoshua bother bringing Klal Yisrael in to EY the first time around when a mere few generations later it turned into wholesale Avodah Zara, Civil war, blooshed and immorality much worse then the modern state of Israel.
What about when Ezra brought Klal Yisrael back in round #2? A very large percentage were married to goyim?!?
As far as your questions to my comment from Motsai Shabbos, how do you explain Hashems intro statemen to Avraham, Yitzchak Yaakov and Moshe Rebbeinu all being that I will give you Eretz Yisroel – its should have been I will give you the Torah in Boro Park or Lakewood?!?
My feeling is that you need to read the whole of Tanach cover to cover 2-3 times and then come back to the table.