My hope is in God' s hands

Jeremiah 41:1-18
Ishmael who was of royal blood and had been one of the king's officers came with ten men to Gedaliah. They killing the king of Babylonia had appointed as governor over the land.
The day after Gedaliah's assassination, before anyone knew about it. 80 men who came from Shechem, Siloh and Samaria, bring grain offerings and incense with them to the house of the Lord, Ishmael kill them also.
Ishmael made captives of all the rest of the people who were in Mizpah and set out to cross over to the Ammonites.
Johanan  and all the army officers who were with him heard about all the crimes Ishmael had committed, they took all their men and went to fight Ishmael.
Ishmael and eight of his men escaped from Johanan and fled to the Ammonites.
They went their way to Egypt to escape the Babylonians, they afraid of them because Ishmael had killed Gedaliah.
Why?
Fearing reprisals from Babylon, the people make ready to escape to Egypt.
Only ten people killed so many people in Mizpah, and they were captive out of there, they went their way to Egypt to escape Babylonians, all of these are same as the Lord said through Jeremiah. No one is living in this land for 70 years.
Ishmael those people were of royal blood, they won't agree the appointed governor by Babylonia over their land.
How?
People do what they please, but it is the wrong way, they didn't know it. I am living in this land, I need the sign from the Lord, I believe that the Lord will help me and show me the way.