He went on to accuse the supporters of the move of being "worse than those who murdered us."
The Rebbe, one of the leaders of the world's biggest Hasidic community, spoke to thousands of followers in the village of Kiryas Joel in Monroe, New York, during an event marking the anniversary of his father's death.
He said that those working to draft yeshiva students were actually seeking to "cause us to leave religion."
'Jews here don't understand the magnitude of the disaster.' Satmar Hasidim (Photo: Yitzhak Weiss)
"A black cloud is hanging these days over our brothers, the people of Israel living in the Holy Land," the rabbi said. "A malicious government has convened… and is seeking to uproot the Torah.
"Jews here don't understand the magnitude of this disaster, which applies to every single individual," he added, comparing the situation to the annihilation of the Jewish people.
"We, in the Diaspora, must be prepared for the moment when we will have to rise up with all our might against this terrible decree so that it is not executed, God forbid."
The radical ultra-Orthodox leaders appear to be sharpening their tone against the IDF draft recently. The other Satmar Rebbe, Rabbi Yekutiel Yehuda Teitelbaum, who visited Israel on the eve of the Knesset elections, stating that "the draft decree aims to make us forget all the other troubles Zionism has inflicted on us. We must fight it uncompromisingly so that such ideas won't even cross their minds."
He referred to the State of Israel and its Zionist residents as "the generation's Amalek," adding that "the Zionists came from the seed of Amalek. There has never been such a sect that caused so much damage to the Jewish people."
About 10 months ago, Rabbi Shmuel Auerbach spoke at a protest organized by the Eda Haredit faction, stating that opposition to enlistment should be regarded a mitzvah that warrants self sacrifice.