okay but what makes me emotional the most is that while in the manga we have the infamous “how ugly we are - lets rest a bit” scene, the anime completely replaces kanekis past selves withering away with hide dying and that implies that hide is such an important person in kanekis life that by being accepted by him he is also able to accept himself
additionally, as yoshimura said, kaneki has places in both the human and the ghoul world, and im pretty convinced the anime represented them with hide and anteiku. its very important that hide carries kaneki to specifically anteiku, because this way when he tells him he knew about everything all along, the two worlds collide. hide dies and anteiku burns down - kaneki has lost both places he could call a “home”.
but what comes after all this is even more beautiful - and even more painful - in my opinion
kanekis hair appearing to have turned black again for short periods of time is the visual representation of how others view him; when touka notices him, she sees him with his original hair color again, because at that time he is the closest to being his former self again. but thats exactly why he wants to be judged by the ccg and arima, who is heavily implied to be some sort of a god figure in both the anime and the manga. kaneki realizes he cant go back to being human, but cant continue his life as a ghoul either.
as he slowly walks down the streets, he is faced with destruction and death - something that seemed completely natural and even necessary to him before. he wanted to protect everyone around him, even if it meant hurting others in the process, but now he realizes those people he killed might have been precious to someone else. to eat or to be eaten - to kaneki at this point neither seems to be the right thing to do
this whole scene might seem to be too long or even irrational (why arent the ccg members attacking him etc), but i think its because its really symbolic. hide is supposed to represent his humanity that he lost. bringing him along with himself is almost like saying “i had him once. he is gone now. he is the proof i was human, but im not anymore. no matter how hard i try to atone for my sins, its never going to be enough. i am here to see god and be judged by him. i accept whatever fate awaits me.” he thinks this is his only chance to “return home”.