Well, now i remember why Roddie is so fucking paranoid about Van. Van threatened to kill all the other reincarnators...
But, he don't take into account that human can grow and can forgive. After Van reincarnated he meet with a lot of people that kind to him to the point he don't care anymore about the reincarnators.
Basically, Rod just don't have the capacity to sympathize and that will be his own undoing.