In this week's Parsha the Torah enumerates the blessings for keeping Hashem's mitzvos, and the dire warnings of what will transpire if they are neglected. Similarly, in the Haftorah, Yirmiyahu warns of what will happen if the Jewish People continue in their idolatrous ways, lacking faith in Hashem and blindly placing total faith in man. Yirmiyahu's words echo down the corridors of history. From the moment of Hashem's irreversible covenant with Avraham, the survival of the Jewish People becomes a natural imperative, no less than the rising of the sun or the flowing and ebbing of the tides. Anti-Semitism is a force placed into nature.
Assimilation is like a nuclear chain reaction.
When a certain critical mass is reached, then the atom bomb of anti-Semitism explodes. The essence of holiness is the separation of that which is holy from that which is not. When the Jewish People forget that their purpose is to be a holy nation, separated from the other nations, then the non-Jewish world turns around and reminds them of their purpose. The spirit of the people is a reflection of the spirit of their Creator. But, he points out, you don't have to please everyone.