ymrbiat
Great Question
shechting doesn’t always mean “שחיטה” It means Slaughtering and is quite often used that way. The Gemara refers to Zecharia ben Yehoyada being “nishchat beheichal” It doesn’t mean they fulfilled the Halacha L’moshe Misinai of shechita R”L. It means he was slaughtered in the heichel. Even if he was killed by decapitation it is not uncommon to refer to, say “6 million Kedoshim who were shechted al kiddush Hashem” Although few of them were decapitated (shechita isnt decapitation of course) they were slaughtered, or shechted if you will.
The Arab was slaughtering his animal. Thus he was shechting it.
This answers a great question you must have on Chulin 13 a.
The Mishna says “shechitas nachri neveila” What do you mean the shechita of a nachri is neveila? A goy can’t shecht????
Must be of course he can shecht/slaghter however the halachaic status of his shechita is that it is neveila.
hope this helps!