On whether it was too cruel for God to kill all the firstborn sons of Egypt?

Some people say that God is so cruel and killed millions of people in the Old Testament. Acts 17:28 In Him we live, move, and have our being. Just like you poets, some say, ‘We are also his children. ’ Deuteronomy 32:39 Now you must know that I and I alone am God, and there is no other god besides me. I kill and I give life, I hurt and I heal, and no one can save from My hand. I often see anti-Christian elements attacking God’s killing of the seven Canaanite tribes in the Old Testament, saying that God is cruel and has killed millions of people! First of all, I want to object to the views of these people. You said that God killed millions of people. You are wrong, wrong! How wrong. The Bible says that God controls everyone’s life. He causes people to die and makes people live. No one can save people from the hands of God. Therefore, God not only killed millions of people, but also made people alive. Since the creation of the world, until now, one generation of human beings has passed and another generation has come, and there are as many dead people as there are stars in the sky and sand on the seashore! What are these millions of people? They are not even enough for a fraction of a percent! So when you want to discuss Christian beliefs in the future, please read the Bible several times before speaking, otherwise you will make a joke! Come again! You say God is cruel! Ouch, I was scared to death! Listen to my advice, don’t dare to say this kind of thing again! Good! Have you ever heard of a Chinese proverb: The King of Hell tells you to die at the third watch, but who dares to leave someone alive until the fifth watch? You really don’t know how to live or die. How dare you say such things to the God who controls your life? Are you willing to die? Please tell me, if you look through thousands of years of Chinese history, have you seen anyone who dares to say to the Lord of Hell that you take so many lives every day, you are too cruel! Ouch, Lord Yama is so cruel! What a big joke! They only care about human life! Your life is in someone else's hands. If you say someone is cruel, are you sure your IQ is still online? So, my friend, please listen to my advice. No matter how much you hate Christianity, just bear with it! Why bother seeking God’s curse on yourself! You are worse than an illiterate old lady in the countryside. You are not stupid enough to scold the Lord of Hell! Finally, to borrow the words of a philosopher, live in the present moment! Because the Bible says: Ecclesiastes 9:10 Whatever you put your hand to do, do it with all your might, for in Hades, where you are going, there will be no work, no planning, no knowledge, and no wisdom.