Katan,
1. This was not a pesak but advice not to listen to a certain false messiah. He does not bring it in Mishna Tora. You cannot explain it away.
2. If it was unnecessary why were the British ym”s so intent on preventing their aliya? Obviously every additional Jew was of the utmost importance in the war.
3.Health merely reiterated old blood libels and relied on a mentally disturbed person who is in prison for violent crimes.
4.You opt to remain ignorant, and this does not change history.
5.I did not find that statement in either of his hakdamot.The closest was a modest statement that he did not come to settle a machloket among the gedolim. He also says that every setttlement in EY is a pekida of the Geula.
6. The Gemara says (Sanhedrin 98a – and see Rashi d”hmeguleh mizeh).
7.Your fantasies have been disproven, and I have tried to bring that for you. You are guilty of the sin of the spies. This was the whole thrust of Em HaBanim Semeicha and a long list of gedolim concur.