True. And in fact Jewish factions themselves, e.g. the Zealots, were as directly complicit in the destruction as the Romans.
From the
Jewish Virtual Library:
"The scene was now set for the revolt's final catastrophe. Outside
Jerusalem, Roman troops prepared to besiege the city; inside the city, the Jews were engaged in a suicidal civil war. In later generations, the rabbis hyperbolically declared that the revolt's failure, and
the Temple's destruction, was due not to Roman military superiority but to causeless hatred (sinat khinam) among the Jews (Yoma 9b). While the Romans would have won the war in any case, the Jewish civil war both hastened their victory and immensely increased the casualties. One horrendous example: In expectation of a Roman siege,
Jerusalem's Jews had stockpiled a supply of dry food that could have fed the city for many years. But one of the warring Zealot factions burned the entire supply, apparently hoping that destroying this "security blanket" would compel everyone to participate in the revolt. The starvation resulting from this mad act caused
suffering as great as any the Romans inflicted."