Is it arrogant to say: "The Jews and the Christians are in the Hellfire?" What about those who say "Only Allāh can judge (i.e. don't declare them disbelievers)". Allāh says in the Qurʾān:

إِنَّ الَّذِينَ كَفَرُوا مِنْ أَهْلِ الْكِتَابِ وَالْمُشْرِكِينَ فِي نَارِ جَهَنَّمَ خَالِدِينَ فِيهَا ۚ أُولَـٰئِكَ هُمْ شَرُّ الْبَرِيَّةِ

Verily, those who disbelieve (in the religion of Islam, the Quran and Prophet Muhammad (Peace be upon him)) from among the people of the Scripture (Jews and Christians) and Al-Mushrikun will abide in the Fire of Hell. They are the worst of creatures. [Sūrah al-Bayyinah, 98:6]

Mūsà Richardson discusses...

https://www.troid.ca/brief-benefits/2416-benefit-is-it-impermissible-to-say-that-the-jews-and-christians-will-go-to-the-hellfire