As-Salaam alaykum,
We have read it in the Holy Qur'an, where Allah, Azzah Wa Jallah, says:--

"...they set forth to you, only by way of argument. Nay, but they are a contentious people". (43:58)

"If anyone contends with the Messenger even after guidance has been plainly conveyed to him
and follows a path other than that of the Believers (ie the companions), We shall leave him in
Hell. What an evil refuge!". (4:115)

"None dispute about the signs of Allah, except those who disbelieve." (40:4)

Debating, arguing and disputing are innovations which throw doubt into the heart, even if the person reaches the truth and Sunnah. Al-Aajurre reports in ash-Sharee'ah (page 57) that a man came to Hasan al-Basree, may Allah be Merciful to him, and said:- "O Abu Sa'eed, let me debate with you about the Religion." Al-Hasan replied, "As for me I know my religion, if you have lost your religion then go and and look for it."

So, follow the religion of Islam as it came from Allah, the Blessed and Most High, to His Messenger, Sallallahu alaihi Wasallam, .. who explained it and his Sunnah to the Believers.... his Companions, may Allah be pleased with them all... and through whom it reached us taday.