Evil basically just means generally harmful toward others. Kobolds tend to steal and/or not care about other races. They also tend to be servants of any race stronger than them (usually reptilian) with a particular goal of serving a true Dragon (usually an evil chromatic Dragon).

Do Kobolds have a God?

Home Plane. Kurtulmak (pronounced: /ˈkɜːrtʊlmɑːk/ KUR-tul-mak) was the patron deity of the kobolds, and they claimed he gave them life. After Kurtulmak created the kobolds and taught them the skills of thieving and pillaging, the gnomes entered into an eternal conflict with his creations, angering him.

What race is a Kobold?

Kobolds are a fictional race of humanoid creatures, featured in the Dungeons & Dragons roleplaying game and other fantasy media. They are generally depicted as small reptilian humanoids with long tails, distantly related to dragons.