Netanyahu told his Cabinet that Sunday's deal gave Iran much-needed relief from the sanctions, but left most of Iran's nuclear infrastructure intact.
In particular, he cited Iran's continued ability to enrich uranium, a key step in making a nuclear bomb.
“What was reached last night in Geneva is not a historic agreement, it is a historic mistake,” Netanyahu said.
“Today the world became a much more dangerous place because the most dangerous regime in the world made a significant step in obtaining the most dangerous weapons in the world.”
Voicing what he called Israel's right to self-defense, he said, “I want to clarify that Israel will not let Iran develop nuclear military capability.”