Statements of Scholars who condemned Bid'ah practices

Umar b. al-Khat'taab, with whom Allah is pleased, said: 'Beware of people who stick to their opinions (and disregard textual proofs) for they are the enemies of the Sunnah; they could not learn, memorize and understand the Hadeeth, so they stuck to their opinions, and lead themselves and others astray.' (Fath al-Bari 13/302)

Ibn Ab'baas, with whom Allah is pleased, said about the words of Allah: (A day faces would be brightened and darkened, as for those whom their faces will be brightened…) They are Ahlus-Sunnah wal-Jama'ah, and the people of knowledge (as for those whom their faces will be darkened) they are the people of Bid'ah and misguidance.' (Usool al-I'tiqaad 1/72)

Umar b. Abdul-Aziz, may Allah have mercy on him, said: 'The Messenger of Allah established Sunnah practices, and his rightly guided Caliphs revived Sunnah practices. Observing these practices would point to the veracity of one's belief in the Book of Allah, and one's complete will to obey Allah, and one's strength in the Deen of Allah. No one can distort or change these Sunnah practices, nor observe anything which opposes it. Whoever observes these practices would be guided aright, and whoever seeks the victory of Allah through it, would become victorious, and whoever opposes and belies it, and follows a path other than that of the believers, Allah would keep him in the path he has chosen, and burn him in Hell, and what an evil abode it is.' (Igaathatul Lahfaan 1/159)

Al-Fudail b. A'yaad, may Allah have mercy on him, said: 'If you see a man of Bid'ah walking on a road, take another road. No deed of a man of Bid'ah will be accepted by Allah, and whoever helps a man of Bid'ah, would have certainly helped in destroying Islam. (Talbees Iblees pg. 14)

Sufyan ath-Thori, may Allah have mercy on him, said: 'Iblees rejoices when a person observes Bid'ah, more than when he commits sinful acts; for the expiation of a sin is to repent to Allah, while the Bid'ah is not expiated by repentance.' (ibid.)

Imam Ibn al-Qayyim, may Allah have mercy on him, said: 'If the heart is busied with Bid'ah practices, that person would abandon Sunnah practices.'(Igaathatul Lahfaan 1/213)

Proofs used by some to support their devious practices

1st Proof:
Some who have little knowledge in Shari'ah claim that the words of the Prophet:
من سن في الإسلام سنة حسنة فله أجرها وأجر من عمل بها بعده من غير أن ينقص من أجورهم شيء، ومن سن في الإسلام سنة سيئة كان عليه وزرها ووزر من عمل بها من بعده من غير أن ينقص من أوزارهم شيء
Meaning: Whoever revives a good Sunnah in Islam, he would receive its reward and the reward of those who practice it; while the rewards of those who practice it would not be lessened. Whoever innovates a practice in Islam, he would receive its sin and the sin of those who practice it, while the sins of those who practice it would not be lessened.' (Muslim #1017)

Our Stance from People of Bid'ah

Allah, the Exalted, says: (Say (O Muhammad) to these idolaters: follow what has been sent down unto you from your Rubb, and follow not any Auliya' (protectors and helpers, etc.) besides Him.) (7:3) ...

Reasons for the spread of Bid'ah

Not applying the Shari'ah of Allah, and being content with other than it. Allah says: (O you who believe! Obey Allah and obey the Messenger (Muhammad) and those of you (Muslims) who are in authority. (And) if you differ in anything amongst yourselves, refer it to Allah and His Messenger () if you believe in Allah and in the Last Day. That is better and more suitable for final determination.) (4:59)