According to Stain, there may be a distinction between real heroes and fake heroes, and we know that Dabi is a staunch Stain disciple. Dabi, in my opinion, saw Hawks as a "genuine hero." Why does Hawks not trust him for one second when he says that the LOV is on his mind? It defies the ideals of a 'real hero.'. After Keigo murders twice, Dabi's thinking shifts dramatically:
To identify this photoshopped photograph from one of Endeavor, you'd have to look very closely. Dabi, despite his lanky frame, has a better grasp of facial traits than the current Number One Hero. Hair color is the only thing that differentiates them, but a bottle of hair dye is all it takes to alter that. Many My Hero Academia fans now believe Dabi is the long lost son of Endeavor, although the creator Kohei Horikoshi has yet to corroborate this theory. At this time, so many pieces of evidence point to Dabi being Touya. However, until the mangaka assembles them, readers remain in limbo with Dabi and his enigmatic history.
Guerrilla warfare was Dabi's most effective mode of operation in the form of uploading his pre-recorded history on the Internet and simultaneously disclosing his actual identity to Endeavor and Shoto. Dabi admitted to Shoto that he had orchestrated his father's contacts with Hood, Starservant, and Ending in an effort to discredit his father, a revelation that enraged Shoto to the point of tears. When Dabi revealed that the Wing Hero was the son of a serial criminal whom Endeavor had previously caught and was also the one responsible for the killings of Twice and Best Jeanist, it was the last nail in the coffin, since murder isn't something heroes often do. As a result of these disclosures, people lost their confidence in heroes and Endeavor became a desolate wasteland. Quirk
