Israel was the aggressor in the 6 day war.
You don't take over the sinai, a piece of jordan and syria in 6 days if you are not the aggressor.
"Arab mobilization compelled Israel to mobilize its troops, 80 percent of which were reserve civilians. Israel feared slow economic strangulation because long-term mobilization of such a majority of the society meant that the Israeli economy and polity would be brought to a virtual standstill. Militarily, Israeli leaders feared the consequences of absorbing an Arab first strike against its civilian population, many of whom lived only miles from Arab-controlled territory. Incendiary Arab rhetoric threatening Israel's annihilation terrified Israeli society and contributed to the pressures to go to war.
Against this background, Israel launched a pre-emptive strike against Egypt on June 5, 1967 and captured the Sinai Peninsula and the Gaza Strip. Despite an Israeli appeal to Jordan to stay out of the conflict, Jordan attacked Israel and lost control of the West Bank and the eastern sector of Jerusalem. Israel went on to capture the Golan Heights from Syria. The war ended on June 10.
- Anti-Defamation League
Your own citation refutes you.
That's a very narrow definition of "aggressor" you're working with there. The aggressor is the one whose aims of conquest force the conflict.