Brothers or not?

While reading the three day road I have noted that there is a lot of differences in the characters Xavier and Elijah. The differences start all the way back when they were children, and their differences in how they were brought up I believe was the root of feeling towards the Wemistioshiw. Elijah went to the residential schools and quickly picked up the way and language of the other people. Which to me would make sense for him to resent and hate the Wemistioshiw, but quite honestly he seems to enjoy the way they do things. the only time I felt he really disagreed was in their medicine but recently found out he tried it despite the fear. Where as  Xavier does not want to accept or integrate into the Wemistikoshiw ways. I believe he resents Elijah for accepting and even participating in the ways of the Wemistikoshiw, Elijah is well liked and even respected by the other men, where as Xavier is more in the shadows. Xavier learns but refuses to learn the language of the Wemistioshiw. I believe we can all agree and say that Xavier cares a lot more for Elijah, you can see this throughout the chapters. For example when they were hunting and there was a forrest fire and Xavier when he woke up first concern was Elijah and he was searching for him swell. However Elijah got himself out without concern for his sleeping "brother". Most recently there has been tension between the two of them when it comes to their places in the group. When Elijah brought up the fact that they maybe separated Xavier seemed torn when Elijah gave off the whole I don't give a shit attitude to be completely honest.