Yes, this guy Kevin James was ill-prepared for this debate.
His answer SHOULD have been something like, "Chamberlain gave Hilter half of Czechoslovakia in an agreement which Hitler quickly violated. The comparison can be made to Obama with this little quote from Obama's own website:
"Obama would offer the Iranian regime a choice. If Iran abandons its nuclear program and support for terrorism, we will offer incentives like membership in the World Trade Organization, economic investments, and a move toward normal diplomatic relations. If Iran continues its troubling behavior, we will step up our economic pressure and political isolation. Seeking this kind of comprehensive settlement with Iran is our best way to make progress."
While, granted, it's not half a country, it amounts to giving a bunch of stuff to a madman, who may or may not keep his end of the bargain."
But then, I think Chris Matthews has strict rules against speaking bad against Obama, so he would've shut off the guy's mike quickly.