Why kaneki?

[Narutrol]

I thought kaneki memory back. Why he tried to end tsukiyama?

 

[Frankenstein]

Had he not, Tsukiyama would have been killed by the CCG.

 

[Ambivalence]

Think. He threw him off the roof. Had he really wanted to end him, he would've done so easily with his kagune. Ken knew the obsessed Karren would dive in to save him, and between that and imprisonment/death for Shuu, he obviously chose to save him in that particular way.

 

[Narutrol]

Think. He threw him off the roof. Had he really wanted to end him, he would've done so easily with his kagune. Ken knew the obsessed Karren would dive in to save him, and between that and imprisonment/death for Shuu, he obviously chose to save him in that particular way.

So he decided to end either tsukiyama or his girlfriend. Killing tsukiyama's girlfriend is as cruel as killing tsukiyama himself

It seems more likely

Kaneki: You should fall from here and die quick than to get tortured by me

 

[iAmSoulNuke]

I thought kaneki memory back. Why he tried to end tsukiyama?

You can look at it two ways
1. that was the only way he couldve let Tsukiyama escape without exposing his self to Ui
2. He doesn't gaf no more
. but only time will tell

 

[DroGGz0r]

So he decided to end either tsukiyama or his girlfriend. Killing tsukiyama's girlfriend is as cruel as killing tsukiyama himself

It seems more likely

Kaneki: You should fall from here and die quick than to get tortured by me

She would have died either way. Eto mentioned it.

Kaneki did his best given the circumstances.