Their were pogroms against Jews in Russia and people were terrified.
So many of the religious ones, called Chalutzim, moved to Eretz Tzion, or made aliyah. When they got to there, there was nothing there for them, they had to start society from the ground up. There was even a fictional ogre, there to murder them.
The Chalutzim formed kibbutzim where they worked the land and formed society.
They built a society and formed yeshivos and shuls.
The Arabs and Ottomans already living there weren't the happiest about al the new people that came there though.
Eventually, those chalutzim's society grew and became the modern state of Israel.