Doubts from the Takfiris and Extremists

[Husayn.El.Sharif]

Assalaamu alaykum,

Some laypersons and youth enthusiastic for Islam but not well grounded in knowledge of the religion, they say the like of:

"But these people (the khawaarij, terrorists, and the likes) they are the only ones standing up for Islam and the Muslims, and defending the Muslims. So why do we insult them, why do we call them 'terrorists' and 'khawaarij' (renegades), why do we not assist them or teach them instead?"