Arabic text has much higher entropy than English. The last two letters in the Arabic word he used (H M) is also the common suffix for "them". That's not strictly equivalent to simply "Morning!" in English.
Maybe the translation algorithm confused "Yisbah-hum" (good morning) with "Yitbah-hum" (Kill them)?
Maybe the translation algorithm confused "Yisbah-hum" (good morning) with "Yitbah-hum" (Kill them)?