Creationist inconsistency when inferring relatedness

Creationists are inconsistent in their application of this method because, while they accept it as a valid way of inferring relatedness among "kinds", they arbitrarily decide that it is invalid for assessing relatedness more broadly. If morphology can be used to reliably infer relatedness in the Cat "kind" for example, why can the same method not be used to infer that cats are more closely related to canids than artiodactyls?

The abuse of evolution has been the use/abuse of theoretical assumptions such as a hierarchy of species and fitness. It allowed people to assume a humans or ethnicity group was on a different level of a hierarchy and people could be deleterious and that humans could be extinguished to improve the process of selection.