I see those folks you mentioned more as 'opponents'. They are not pretending to be something else. Fifth columnist pretend to be something other than what they are in order to change the direction of the group they are pretending to be part of.
Exactly. Just like the pro-abort liberals who disguise themselves as conservative Republicans in order to support a pro-abort liberal on a conservative forum. Many of these same fifth column disruptors spent their time here in 2003 discouraging support for conservative Republican McClintock in the California Recall Election and supporting liberal RINO Schwartzenkennedy. There still here and they're still discouraging support for the conservative candidates while promoting the most liberal ones. Yet they CLAIM to be conservative Republicans. Their behavior exposes them for the fifth columnists that they are.