[darkreever]

One of the big reasons that the two chapters may have grown apart is because of their very nature after the Heresy. The wolves are fairly straightforward while the angels became those who skulk about in lies and the dark. Its not hard for the two groups to stop seeing eye to eye, and without their leaders to hold them together by frail bonds its no surprise that they drifted.

Plus, the stories of their fight and the rivalry not being friendly are likely things more outspoken and exaggerated than them being friends and all buddy buddy. Ten thousand years of exaggeration and drifting have that effect, and Bjorn isn't exactly setting the record straight by keeping quite.