وعليكم السلام ورحمة الله وبركاته

You have raised a valid question, and it deserves a clear and well-supported response rooted in the Qur'an, Sunnah. Before addressing the specific points, I must remind you to maintain proper manners when discussing matters of the knowledge or any other issue. Criticism is welcome, but it should be free from assumptions and based on knowledge. Firstly, there is no blanket fatwa that categorically labels attending a university haram in all circumstances. How can this be when there are many non-mixed universities across the world (especially in the Muslim lands) that no single scholar has said is impermissible to attend as per our knowledge. The prohibition, as has been clarified by numerous scholars, is conditional. It is tied to the environment and practices within universities, such as: • Free-mixing (Ikhtilat): This is a significant issue, as free-mixing is prohibited in Islam and is a widespread problem in universities. • Exposure to immorality or deviation: Whether this is the curriculum itself (e.g., secular ideologies or un-Islamic concepts being taught without a framework of Islam) or the general atmosphere, these can corrupt a person's deen. If these factors are present and unavoidable, then yes, attending such places becomes impermissible in the correct view of the people of knowledge. After understanding this, kindly provide from the fatāwā circulated by the noble brother Abū Ishāq حفظه الله where he quoted a single fatwā that deems the 'the origin' of attending university as impermissible as per your email. The act of delivering a lecture or reminder at a university is not the same as endorsing the institution or an encouragement to attend them. It is an opportunity to provide guidance to Muslims who are already present in such an environment. Scholars of the past and present have always emphasized the importance of delivering da'wah wherever Muslims are in need of it, provided that the means of doing so do not violate the Shari'ah and guidance of the Salaf. The Prophet Muhammad ﷺ would give da'wah to people in marketplaces, where un-Islamic practices occurred. Rabi’ah ibn ‘Abbad al-Dili narrated: "I saw the Messenger of Allah (peace and blessings be upon him) with my own eyes in the marketplace of Dhul-Majaz. He was saying: 'O people, say: La ilaha illa Allah (There is no god but Allah), and you will be successful.' He would walk among the paths of the market while the people gathered around him, but I did not see anyone responding to his call. He continued, saying: 'O people, say: La ilaha illa Allah, and you will be successful.' Behind him was a man with a squint in his eyes, a bright face, and two braids. He was saying: 'He is a liar who has turned away from the religion (a sabian).' I asked: 'Who is this man (calling to prophethood)?' They said: 'Muhammad ibn Abdullah, who claims to be a prophet.' I then asked: 'Who is this man who is denying and opposing him?' They said: 'His uncle, Abu Lahab.' I asked: 'Were you young at the time?' He replied: 'No, by Allah, I was fully aware and able to understand that day.'" Zawa’id Musnad Ahmad (16023) While Jabir ibn Abdullah (may Allah be pleased with him) said: "The Messenger of Allah (peace and blessings be upon him) stayed in Makkah for ten years, approaching people in their dwellings at (the markets of) 'Ukādh, Majannah, and during the seasons at Mina, saying: (Who will support me? Who will help me convey the message of my Lord? For him will be Paradise.)" Ahmad in al-Musnad (3/322). These were the largest markets in Jāhiliyyah and one can only image how much vices and evils were ongoing. However, this did not mean he ﷺ endorsed those practices but rather sought to bring light into those dark places. Similarly, giving a lecture at a segregated university hall is an opportunity to advise Muslims and encourage them to adhere to Islam.