The Israelites saw the amazing power the Lord showed against the Egyptians. So the Israelites had great respect for the Lord and put their trust in him. They also put their trust in his servant Moses.
Some Jews had been comforting Mary in the house. They noticed how quickly she got up and went out. So they followed her. They thought she was going to the tomb to mourn there.
At the same time that Jesus did those signs, many of the Jewish leaders believed in him. But because of the Pharisees, they would not openly admit they believed. They were afraid they would be thrown out of the synagogue.