The pipeline bringing natural gas to Israel was built by a consortium of which Israel is a 25% partner. This pipeline went into use in 2008 not 1979. 1979 was the year of the peace treaty not the business deal. The above story is a Reuter BS story.
Palestinians report IDF airstrikes on Islamic Jihad targets in southern Gaza Strip (Haaretz)
from the article: Egypt ex-energy minister detained for questioning on Israel gas deal