This is nothing new really:
"I recently (Oct. 2006) exchanged emails with a friend in Jerusalem. He is adamant. Ethiopian Jews are not Jewish. To bolster his point, he cites DNA evidence, evidence that, at most, can indicate that Ethiopian Jews not descended from the southern tribes of Israel, primarily Judah and Levi. He also cites Hebrew University's Steven Kaplan, who believes Ethiopian Jews adopted Judaism in the early Middle Ages as part of a wave of Judaization sweeping Ethiopia. (Kaplan himself fully supports EJ aliya and absorption, and is very clear on those points.) There is also evidence of this noted by another academic who specializes in Ethiopian song.
"The point of this post is not to refute this belief, but I will make one simple point regarding it: Nothing these academics believe and nothing in that DNA evidence precludes conversion to Judaism. In other words, at best this evidence proves not that Ethiopian Jews are goyyim, but that Ethiopian Jews may be converts. And, when you factor in what academics of equal stature say in opposition, or what many others say – based on solid evidence – about the lineage of Ashkenazi Jews, for example, or the 'unity' of the Tribes of Israel, one quickly realizes that all of this evidence is a two-edged sword; what cuts the black Jews you so dislike cuts you, deeply, as well....
"I would think that if a people had suffered so much and risked so much for Judaism and Israel, we would, at the very least, be civil toward them. We certainly would want to help them out of danger and distress, and do whatever is necessary to help them succeed. Yet, in the Ashkenazi Orthodox world (especially in the American part of it) the opposite is often the case. Here is a quote from an email sent to me by a leading member of the RCA: "[A leading Orthodox professor with close ties to Chabad] once said that the poskim who affirmed the certain Jewishness of the Ethiopian Jews were those who did not read a European language." This is a racist slap at the dozens of Sefardic poskim who hold, just like Rabbi Ovadia Yosef, that Ethiopian Jews are 100% Jewish. Needless to say, this Orthodox professor is not known as a friend to Ethiopian Jews in any way, not even following Rabbi Feinstein's minimalist position quoted above – a position, by the way, endorsed by Rabbi J.B. Soleveitchik and dozens of others, as well.
"I think this all points to a larger malaise in Orthodoxy, a malaise that has turned morality into "what can we get away with" rather than "what is the ideal we should strive for."
Ethiopian Jews And Orthodox Jewish Racism - FailedMessiah.com