Talmudic source for Satmar approach
Rav Yoel Tietelbaum, Satmar Rabbi, in his book Vayoel Moshe
"Zionism is the greatest form of spiritual impurity They have polluted the Jewish people with their heresy."
"...if we place all the immodesty and promiscuity of the generation and the many sins of the world on one side of the scale, and the Zionist state on the other side of the scale by itself, it would outweigh them all.
"Zionism is the greatest form of spiritual impurity in the entire world."
"They are polluting the entire world. They have polluted the Jewish people with their heresy, Heaven help us."
"It is no surprise why G-d's anger comes down from heaven. It is necessary to repent and escape from them more than from a lion who is chasing a person to kill him."
"It has been explained that before the coming of the Messiah, this regime will come to an end, as Messiah cannot come any other way, since the Zionist state holds up the redemption of the world."
"We need G-d's mercies that divine intervention should bring about the end of the state. May G-d have mercy on us all."
From Neturei karta website:
The People of Israel oppose the so-called "State of Israel" for four reasons:
FIRST -- The so-called "State of Israel" is diametrically opposed and completely contradictory to the true essence and foundation of the People of Israel, as is explained above. The only time that the People of Israel were permitted to have a state was two thousand years ago when the glory of the creator was upon us, and likewise in the future when the glory of the creator will once more be revealed, and the whole world will serve Him, then He Himself (without any human effort or force of arms) will grant us a kingdom founded on Divine Service. However, a worldly state, like those possessed by other peoples, is contradictory to the true essence of the People of Israel. Whoever calls this the salvation of Israel shows that he denies the essence of the People of Israel, and substitutes another nature, a worldly materialistic nature, and therefore sets before them, a worldly materialistic "salvation," and the means of achieving this "salvation" is also worldly and materialistic i.e. to organize a land and army. However, the true salvation of the People of Israel is to draw close to the Creator. This is not done by organization and force of arms. Rather it is done by occupation to Torah and good deeds.
SECOND -- Because of all of this and other reasons the Torah forbids us to end the exile and establish a state and army until the Holy One, blessed He, in His Glory and Essence will redeem us. This is forbidden even if the state is conducted according to the law of the Torah because arising from the exile itself is forbidden, and we are required to remain under the rule of the nations of the world, as is explained in the book VAYOEL MOSHE. If we transgress this injunction, He will bring upon us (may we be spared) terrible punishment.
THIRD -- Aside from arising from exile, all the deeds of the Zionists are diametrically opposed to the Faith and the Torah. Because the foundation of the Faith and Torah of Israel is that the Torah was revealed from heaven, and there is reward for those who obey it and punishment for those who transgress it. The entire People of Israel is required to obey the Torah, and whoever doesn't want to, ceases to be part of the congregation of Israel.
FOURTH -- Aside from the fact that they themselves do not obey the Torah they do everything they can to prevent anyone they get under their power from fulfilling the commands of the Torah, the claims to freedom of religion are lies. They fight with all of their strength to destroy the Faith of Israel.