Read John 12:42 Using Other Translations
Nevertheless among the chief rulers also many believed on him; but because of the Pharisees they did not confess him, lest they should be put out of the synagogue:
Nevertheless, many even of the authorities believed in him, but for fear of the Pharisees they did not confess it, so that they would not be put out of the synagogue;
Many people did believe in him, however, including some of the Jewish leaders. But they wouldn’t admit it for fear that the Pharisees would expel them from the synagogue.