YOU SAID:

I say send them all back to where they came from

INTO JAPANESE

私は彼らがどこから来たのかすべてにそれらを送って言う

BACK INTO ENGLISH

I will send them to all of them where they came from

INTO JAPANESE

私は彼らがどこから来たのすべてにそれらを送信します

BACK INTO ENGLISH

I will send them to all of them where they came from