How many times did the Jews go to war against Israel?

I don't know, but it seemed common enough.

1 Kings 12:21

When Rehoboam arrived in Jerusalem, he mustered all Judah and the tribe of Benjamin—a hundred and eighty thousand able young men—to go to war against Israel and to regain the kingdom for Rehoboam son of Solomon.

1 Kings 14:30

There was continual warfare between Rehoboam and Jeroboam.

1 King 15

16 There was war between Asa and Baasha king of Israel throughout their reigns. 17 Baasha king of Israel went up against Judah and fortified Ramah to prevent anyone from leaving or entering the territory of Asa king of Judah.

When the 12 tribes split into a 10 tribe and a 2 tribe kingdom they had a few conflicts.

They were part of Israel, so this would be incorrect thinking. Now, they did go to war with neighboring tribes, meaning the other tribes of Israel, long after they had left Egypt. The Jews come from Judah, one of the son's of Jacob.

Are you talking about the Zionists... who rule Israel now?

In that case Zionists are pseudo-jews and have no historical relationship to the children of Israel. They (the Zionists) are warring tribed from east central Europe popularly referred to as

Ashkenazi Jews . They do what they know best, that is incite war..

Why would the Jews go to war with Israel? Do you mean the Palestinians?

Israel is a Jewish nation.