Doing so would mean losing his position and his prestige. Joseph was not the only one in this predicament.
لَقَدْ عَرَفَ أَنَّ ٱلْيَهُودَ أَبْغَضُوا يَسُوعَ وَٱتَّفَقُوا أَنْ يَطْرُدُوا مِنَ ٱلْمَجْمَعِ كُلَّ مَنْ يَعْتَرِفُ بِهِ .‏