What is the ruling on praying behind an Imām who makes Qunūt in the second Rak‘ah of every Fajr Prayer before Rukū‘ ? Is Qunūt in the Fajr Prayer a Sunnah or Mustaḥab (desirable)?

What is the ruling on praying behind an Imām who makes Qunūt in the second Rak‘ah of every Fajr Prayer before Rukū‘ ? Is Qunūt in the Fajr Prayer a Sunnah or Mustaḥab (desirable)?
Many modern day ‘Muslim’ speakers have adopted the approach of memorizing quotes from the scriptures of the disbelievers in order to debate them and they consider this a methodology to invite to Islam. Was this practice known to the Prophet ﷺ or his Companions? Imām Muqbil bin Hādī al-Wādiʿī answers.
A comprehensive explanation of the Āyāt & Aḥādīth regarding Yaʾjūj and Maʾjūj to remove the doubts spread by people of rhetoric (Ahl al-Kalām)
In our times where the webs and nets of Hizbiyyah have been beautified by its people, in the form of discreet principles aimed to aid their deviations from the Sunnah, many a people have been misguided due to it. Before the reader is a small treatise that sheds light on some of those false principles.
A beneficial compilation that uncovers the truth regarding this occurence on the day of ʿĀshūrah in the place called Karbalā, including the following topics: 1. The Death of Al-Ḥusain bin ʿAlī bin Abī Ṭālib -Allāh is pleased with them both- 2. When was the Innovation of the Shīʿah on the Day of ʿĀshūrah First Practiced? 3. The People of Knowledge, Past and Present, have Condemned these Radical Actions of the Shīʿah 4. Some Innovations which were brought along to oppose the Shīʿah on the Day of ʿĀshūrah
Is it permissible to celebrate religious ‘Eids (festivals) such as the Mawlid (the Prophet’s birthday) and the 15th night of Sha‘ban etc., according to the occasion?