The Expositor’s Bible Commentary vol.8 p.104-105 says it is this view, because the single preposition in Greek would indicate not two baptisms (Spirit for believers and fire of judgment for unbelievers) but just one baptism (Spirit and cleansing fire)
Wako watu wanaoona kuwa kuwepo kwa kihusishi kimoja kwenye lugha ya Kigiriki kunaonyesha ubatizo mmoja siyo mawili (kwa Roho kwa waumini na kwa moto kama hukumu kwa wasioamini) lakini ubatizo mmoja tu (kwa Roho na moto utakasao).