Just Like Killing Chickens

A jihadi said that beheading Kafirs, non-Muslims, is like killing chickens so he has no remorse. And why would he feel nothing? Could it be that he believes that Kafirs are worse than animals? Allah says:

Koran 25:44 Do you think that most of them hear, or understand? They are just like animals; no, they are far worse.

The jihadi has the moral right to behead the Kafir. He is following Allah’s commands