Before coming to Israel they didn”t read Hebrew, have Hebrew names, have a Torah, follow halacha, etc. The vast majority of Ethiopians who came to Israel are practicing Christiana. There are a minority sincere Ethiopian converts; the few converts I met I found to be wonderful, very refined in chacter.
Rav Ovadia Yosef zt”l relied on Radbaz ruling on the Falashas, however the Radbaz clearly rules that they are Karaites. And this was 500 years ago. They subsequently likely assimilated into the Abyssinian population according to many contemporary gedolim who ruled that the Ethiopian Falashim who are Karaites accepted gentiles and were not converted according to halacha and therefore they are Safek Akum and their identity as a Jew is in doubt.
The Ethiopians are not Jewish, they are Safek Akum and definitely Karaites. There is a community of Karuim in Ukraine, will they be considered full Jews as well by the “Jewish state”?