My reply is to ask would a dog or cat live peacefully within a group of humans?

Neither dogs nor cats are particularly intelligent as animals go. For example, both are not as good at puzzle solving compared to many ravens, crows and other corvids when it comes to puzzle solving). For example, New Caledonian crowscan engage in sequential tool use. Moreover, chimpanzees are extremely intelligent and also very violent.

The particular example you gave, of dogs and domestic cats, is particularly bad because these species have been domesticated by humans, and thus have been bred for docility.