Why obama says back to '67 borders? yes israel captured territory,but the war started in self defense (wiki)?

In May 1967, Ner received false reports from the Soviet Union that Israel was ming on the Syrian border[18]. Ner began ming his troops in the Sinai Peninsula on Israel's border (May 16), expelled the UNEF force from Gaza and Sinai (May 19) and took up UNEF positions at Sharm el-Sheikh, overlooking the Straits of Tiran.[19][20] Israel reiterated declarations made in 1957 that any closure of the Straits would be considered an act of war, or justification for war.[21][22] Ner declared the Straits closed to Israeli shipping on May 22–23. On May 30, Jordan and Egypt signed a defense pact. The following day, at Jordan's invitation, the Iraqi army began deploying troops and armored units in Jordan.[23] They were later reinforced by an Egyptian contingent. On June 1, Israel formed a National Unity Government by widening its cabinet, and on June 4 the decision was made to go to war. The next morning, Israel launched Operation Focus, a large-scale surprise air strike that was the opening of the Six-Day War.