Ketubot 110B-111A“Our Rabbis taught: One should always live in the Land of Israel, even in a town most of whose inhabitants are idolaters, but let no one live outside the Land, even in a town most of whose inhabitants are Israelites; for whoever lives in the Land of Israel may be considered to have a God, but whoever lives outside the Land may be regarded as one who has no God. For it is said in Scripture, To give you the Land of Canaan, to be your God. Has he, then, who does not live in the Land, no God? But [this is what the text intended] to tell you, that whoever lives outside the Land may be regarded as one who worships idols….But [the text intended] to tell you that whoever lives outside the Land may be regarded as one who worships idols.” “R. Zera was evading Rab Judah because he desired to go up to the Land of Israel while Rab Judah had expressed [the following view:] Whoever goes up from Babylon to the Land of Israel transgresses a positive commandment, for it is said in Scripture, They shall be carried to Babylon, and there shall they be, until the day that I remember them, saith the Lord. And R. Zera? — That text refers to the vessels of ministry.And Rab Judah? — Another text also is available: I adjure you, O daughters of Jerusalem, by the gazelles, and by the hinds of the field, [that ye awaken not, nor stir up love, until it please]‘.And R. Zera? — That implies that Israel shall not go up [all together as if surrounded] by a wall.And Rab Judah? — Another ‘I adjure you’ is written in Scripture.And R. Zera? — That text is required for [an exposition] like that of R. Jose son of R. Hanina who said: ‘What was the purpose of those three adjurations? —One, that Israel shall not go up [all together as if surrounded] by a wall; the second, that whereby the Holy One, blessed be He, adjured Israel that they shall not rebel against the nations of the world; and the third is that whereby the Holy One, blessed be He, adjured the idolaters that they shall not oppress Israel too much’.
“R. Hama b. Hanina said: The son of David will not come until even the pettiest kingdom ceases [to have power] over Israel, as it is written, He shall both cut off the sprigs with pruning hooks, and take away and cut down the branches; and this is followed by, in that time shall the present be brought unto the Lord of hosts of a people that is scattered and peeled.“
“R. Abba also said: There can be no more manifest [sign of] redemption than this: viz., what is said, But ye, O mountains of Israel, ye shall shoot forth your branches, and yield your fruit to my people of Israel, for they are at hand to come.”
The Chazon Ish instructed his followers to be involved in the State of Israel and gave a clear decree to vote in Israeli elections.Rav Shlomo Zalman Aurbach told his students of they want to go visit the grave sites of righteous Jews he should go to Mount Hertz where IDF soldiers are buried. He also voted in Israeli elections!Rav Shach who was the leading Tora Authority according to all religious Jews (except Satmar and the likes of them) was an Israeli citizen and voted in the Israeli elections.Rav Soloveichik put in his candidacy to become the chief rabbi of Tel Aviv in 1935. One can read in his memoirs just how close he became with the religious Zionist movement.Rav Moshe Feinstein clearly stated it is appropriate to pray for the well being of the State of Israel.