Assalamualaikum,
I was wondering if Nouman Ali Khan and Mufti Menk are reputable people whose speeches we can listen to.
Jazakallah
الجواب وباللہ التوفیق
One should listen to religious speeches and discourses of certified, authentic, pious, and Ahl e Haq Scholars whose nobleness and piety also have a special effect. There is more apprehension of getting mislead by the speeches of Non Ahl e Haq persons. It comes in Sahih Muslim,
عَنْ مُحَمَّدِ بْنِ سِيرِينَ، قَالَ: «إِنَّ هَذَا الْعِلْمَ دِينٌ، فَانْظُرُوا عَمَّنْ تَأْخُذُونَ دِينَكُمْ» (صحیح مسلم:1/14)
Translation: Have good verification of the persons from whom you are taking and learning the talks of Deen. The essence of this is that there is extreme danger of getting mislead by having the talks of Deen from non-authentic non-certified person. One should avoid their discourses.
واللہ اعلم بالصواب