The 3 types of sins that Shaitaan commands:

بسم الله والحمد لله والصلاة والسلام على رسول الله ، وبعد

  

Allaah تعالى said:

﴿وَلَا تَتَّبِعُوا خُطُوَاتِ الشَّيْطَانِ ۚ إِنَّهُ لَكُمْ عَدُوٌّ مُّبِينٌ * إِنَّمَا يَأْمُرُكُم بِالسُّوءِ وَالْفَحْشَاءِ وَأَن تَقُولُوا عَلَى اللَّـهِ مَا لَا تَعْلَمُونَ﴾

{and follow not the footsteps of Shaitaan (Satan). Verily, he is to you an open enemy.  He commands you only what is Soo’ (evil) and Fahshaa’, and that you should say against Allaah what you know not.} [Surah al-Baqarah (2): 168-169]

Shaikh Ibn al-`Uthaymeen رحمه الله explained:

Al-Soo’: every type of disobedience and Minor sins.

Al-Fahshaa’: Major sins, like fornication.

 

Shaitaan commands to do both type of sins, the minor as well as the major ones. The minor sins are removed by the good deeds as long as the person avoids the major sins. Still the Shaitaan commands the people to do the minor sins because, when a person does a sin after another, it corrupts him and it corrupts his heart…

Shaitaan also commands one to say against Allaah without knowledge, i.e. you attribute a saying to Allaah without knowledge.

--end of quote from the Tafseer by Shaikh Ibn al-`Uthaymeen.

This is how Shaitaan gradually deceives the people. He engages them in minor sins. Once they are adapted to these minor sins, he directs them towards the major sins.

But the worst of all these sins is that a person speaks about Allaah and His Deen without knowledge. Making things Halaal or Haraam according to his understanding; interpreting the Book of Allaah according to his understanding; overlooking the authentic Ahaadeeth because it conflicts with his understanding and so on.

We ask Allaah for His protection and for our well-being.