Under the conventions on genocide, it is considered genocidal to forcibly alter the demographic of a territory. In this case, Yishai is talking about forcibly removing the non-chosen people in open pursuit of a more racially pure territory. This is borderline genocidal.
Report: IDF find M-16 rifle hidden in Palestinian's car in West Bank (Haaretz)
from the article: Yishai: Deporting foreign children preserves Israel's Jewish identity