You’re missing the point.
The Robertsons enjoy the support of millions of people who view the current occupant of the White House as an enemy of the United States.
Attending a party that appears to be little more than a love fest for the Occupant, will naturally produce a less than positive reaction among those who support the Robertsons.
It’s a simple human dynamic, and people in the entertainment business err terribly when they ignore it.
Actually if they are aware of it I’d be even more impressed they would go. I think your point makes it all the more obvious and it’s not really about the enemy in the White House(which by going doesn’t show support of) but rather it shows the pettiness of people that say they have Christian values. The hate in people’s hearts is the real tragedy here. I think Obama is a disaster, but I’m not going to hold the Robertsons to missing out out a correspondence dinner simply because Obama is in the White House. It’s petty, childish, and just plain sad.