OK, so you vehemently accused the Gedolei HaPoskim of recklessly endangering Jewish lives due to ignorance, while you were personally uninformed regarding both the Metzius and the Halacha.
We certainly know that anti-Semitism exists, but where do you see that an Eiva that leads to Sakana is caused by lack of Jewish organ donors??? That is the threshold cited by the Chasam Sofer; his Heter is more accurately termed Sakana than Eiva. Anti-Semitism long preceded organ transplants, and no one permitted Issurim due to a vague resentment.
Are you suggesting that the Arabs would cease their terrorist attacks and skin-heads would leave us alone if we merely started donating organs??? If you can prove that, I will grant you that the Chasam Sofer would likely permit organ donation after cardiac death.
Reb Moshe OC 4:79 also favors the Chasam Sofer over the Mishna Berura; however, he interprets it as I did to require a concrete concern of Sakana.