Ahl-us-Sunnah's (Sunni) Stance on Religious Innovators
2 hadiths
None of you (truly) believes until his personal desire complies with what I have come with
Abu Muhammad ‘Abdullah ibn ‘Amr ibn al-‘Ās (may Allah be pleased with him and his father) reported: The Messenger of Allah (ﷺ) said: "None of you (truly) believes until his personal desire complies with what I have come with."
At the end of time, there will come a people, young in age and foolish in mind. They will speak about the best words of creation, but they will pass through Islam as an arrow passes through its target
‘Ali (may Allah be pleased with him) reported: If I narrate to you anything from the Messenger of Allah (may Allah's peace and blessings be upon him), it is dearer to me to fall from the sky than to lie about him. But if I speak to you concerning matters between me and you, then war is deception. I heard the Messenger of Allah (may Allah's peace and blessings be upon him) say: "At the end of time, there will come a people, young in age and foolish in mind. They will speak about the best words of creation, but they will pass through Islam as an arrow passes through its target. Their faith will not go beyond their throats. Wherever you encounter them, kill them, for killing them is a reward for the one who kills them on the Day of Judgment."