The brother's line of thought was concerning a split within PHA a long time ago. It was not 'racially' motivated. At least, this is how I read into his original reply as shown below.
PHA:
decedents of the African Lodge and are legitimate masons.
PHO:
PHO is also referred to as "National Compact." Quite some time ago (mid 1800's IIRC,) some Prince Hall Lodges decided to have a national Grand Lodge. They apparently thought all Prince Hall Lodges would go along, but they didn't. So, it caused a schism. PHO has a national Grand Lodge (
http://www.mwnationalgrandlodge.org/), PHA is organized with state Grand Lodges only. When "mainstream" state Grand Lodges started recognizing Prince Hall, they started recognizing PHA. I also think there a lot more PHA Lodges and brothers than PHO.
From: http://www.myfreemasonry.com/threads/pho-vs-pha.18791/#post-102255