Yes, I understood what he was trying to say. Within the housing market there is deflation and an interest rate decrease would spark that sector and help alleviate some of the problems.
That said, he is wrong to suggest that there is overall deflation. With energy prices remaining high and likely to go higher (not lower) there is inflation. With countries like China becoming net importers of grain for the first time, countries like Brazil using grain for fuel etc... grain prices will continue to drive food prices higher... not lower. With unemployment under 5%, that will continue to have an upward pressure on wages, not down.
The housing market is certainly big as if people continue losing value, they tend to perceive greater losses than truly exist and they tend to stop spending. So it is a balancing act the fed must maintain. They cannot let the housing market fall to the point consumers stop spending and they cannot help the housing market to the extent that inflation causes the consumers to stop spending.
ROCK-Fed-HARD PLACE