"'Then the Lord said to him, "Take off your sandals; the place where you are standing is holy ground. I have indeed seen the oppression of my people in Egypt. I have heard their groaning and have come down to set them free. Now come, I will send you back to Egypt."'" NIV translation
Can you imagine the thoughts going through the head of Moses? God spoke to him and said that He was going to send him back to Egypt. Remember that Moses left because he was afraid that the authorities would find out about him killing an Egyptian. Just like Moses, God may put us in difficult circumstances to further His plan but we must remember that He is always there with us and in control.
"'This is the same Moses whom they had rejected with the words, "Who made you ruler and judge?" He was sent to be their ruler and deliverer by God himself, through the angel who appeared to him in the bush. He led them out of Egypt and did wonders and miraculous signs in Egypt, at the Red Sea and for forty years in the desert. This is that Moses who told the Israelites, "God will send you a prophet like me from your own people." He was in the assembly in the desert, with the angel who spoke to him on Mt Sinai, and with our fathers; and he received living words to pass on to us.'" NIV translation
Stephen continues his recap of Jewish history in his speech to the Sanhedrin. He reminds them of the rejection of Moses by the Israelite men who were fighting.
He also reminds them that, after that time, God sent him to be the deliverer of Israel. It did not matter if people did not like it, God had appointed him.
The same is true of when Jesus came down to the earth. It did not matter what the Jewish rulers said because God had appointed Jesus to be the deliverer of His people. The same thing happens today, in that many of the established "churches", are pushing God out and replacing His word with their rules. Jesus came to set us free and we should not then rush back into the bondage of priests and their rules or traditions.
"'But our fathers refused to obey him. Instead, they rejected him and in their hearts turned back to Egypt. They told Aaron, "Make us gods who will go before us. As for this fellow Moses who led us out of Egypt- we don't know what has happened to him!" That was the time they made an idol in the form of a calf. They brought sacrifices to it and held a celebration in honor of what their hands had made.'" NIV translation
Stephen is now reminding the Sanhedrin of the time in the desert that the people of Israel turned away from God. Instead of waiting on God and His commands (Moses was on the mountain getting the stone tablets from the very hand of God), the people had a golden calf made. Then, as Stephen said, they honored what their hands had made. That is called idolatry and was #1 on God's list of commandments. Even so, many "churches" as well as individual Christians today honor what their hands make.