Is God What We Think He Is?

As I read chapters 8-15 from the Exodus,I began to think on how God was punishing the Egyptians. I thought on how some of the nine plagues were so unfair. For example one of the plagues that impacted me the most was the tenth plague. The plague in which God was punishing all the Egyptians firstborns. "5)And all the firstborn in the land of Egypt shall die, from the firstborn of Pharaoh that sitteth upon his thrown, even unto the firstborn of the maidservant that is behind the mill; and all the firstborn of beasts." (Exodus 11 verse 5).
After I read this passage all I could think about was on how unfair God had been. This tenth plague was definetly NOT just. God punished many innocent Egyptians with this plague. Many of the firstborns were children and babies, innocents, who had nothing to do or could do nothing about gving freedom to the Jewish people. And God decided to punish them, to kill them. Religions always say that God wants good for all and fairness to everyone. But after reading this how can we be sure that this is what God wants? And, is God really a perfect figure to imitate, or is it just that this is the way people want to see him as?
Something else I found interesting on Chapter 11 of the Exodus was: "7)But against any of the children of Israel shall not a dog move his tongue, against man or beast: that ye may know how that the Lord doth put a difference between the Egyptians and Israel." (Exodus 11 verse 7). When I read this I thought on how unfair God is again. This is a perfect example of discrimination. God here devided the Israelites from the Egyptians putting preference to the Jewish people. He discriminated the Egyptian children even though they were innocent children just like the Isrealites. God sentenced them to death just because they were Egyptians. If this is not discrimination then what is it? Religions always say that we should treat everyone equally, that we should not treat anyone worse no matter what. But, isn't it kind of hypocritical for them to say this when God also discriminates?
After reading this part from the Exodus, I was able to see that God isn't as perfect, as just, or as good as we think he is. And this made me ask myself: Is God really what we think he is? Or, is this just the way people want to see him as?