Why did the Pharaoh fear the Hebrews?

Answer 1

Assuming that you are asking in regards to the era of Moses, here is your answer:
There was a pharoah that came after goshen had been settled by Joseph's people, who did not know of Joseph. The Hebrews multiplied greatly in Goshen and the pharoah claimed to have felt threatened. He put them into slavery and also decided to kill the male babies. Unfortunately for him, his plan didn't work. See Exodus ch.1-12.

Answer 2

The Torah states that Pharaoh claimed that the high Israelite birth-rate could pose a potential threat (Exodus ch.1).On a spiritual level, the Egyptian slavery was brought about by God (see Genesis ch.15). It taught us the importance of loving the stranger (Deuteronomy 10:19), it showed us the power of God when He redeemed us (Exodus 10:2) as well as His personal concern for us (Exodus 2:24); and it served as the "iron furnace" (Deuteronomy 4:20) which smelted us (the Israelites) into a nation and separated the dross.

See also the Related Links.

Link: Timeline

Link: The Exodus

Answer 3

They were growing rapidly in population, and Pharaoh thought they might join with the enemies of Egypt if there were ever a war.

Answer 4

He was afraid that the Hebrew people as they were increasing in number , and would outnumber the Egyptians. But we must remember that the Egyptians treated Joseph and all well for years.

Answer 5

They were afraid that if war came, the Hebrews would side with their enemies.