People who claim that Is rael doesn't sponsor terrorist, why did the CIA say differently on the wikileak?

Let's look at the what you repeated from the article. Baruch went to Israel and joined an extremist group. How does that mean that Israel sponsored the group. The KKK is an extremist group operating in the U.S.A., by the logic you are using above (the country that the extremist group operates from must sponsor said group) then that would mean that the U.S. sponsors the KKK. Israel did not sponsor the attack, Kach did. Just like when the KKK commits a crime, the KKK is responsible, not the United States.