An Objection to Long Trousers?

A brother, dear to my heart, objected to the recent post entitled "Is Having Long Trousers A Major Sin? (Nope)" by saying:

Walaikum assalam,

Sidi, that is not the point. The point is that our Sunni belief is that EVERY believer, even the worst of sinners, CAN be forgiven by Allah, regardless of whether or not they ARE forgiven. That is all I am saying.

And the position that wearing something below one's ankles is somewhat disliked (makruh tanzihan) is the position of Ibn Abidin, al-Tahtawi, the authors of al-Fatawa al-Hindiyya, Abd al-Hayy al-Lakhnawi, al-`Ayni, and Mulla Ali al-Qari of the Hanafis. These are the MASTERS of the Hanafi school. It is the position of Imam al-Nawawi in Sharh Sahih Muslim, and of the Shafii school. So how can someone who does it be considered to be committing a major sin? If these people did not know the fiqh of the Qur'an and Sunnah, then no one did. Of course, it is more pleasing to Allah & in more accordance to the guidance of His beloved Prophet (Allah bless him & give him peace) to keep one's trousers above the ankle whenever possible.

Wassalam,  your brother,
Faraz Rabbani