The problem is that platform being advanced by Obama and Biden has been authored well ahead of time by gun control organizations. Before you call me a conspiracy theorist, I'll state that this is not a conspiracy if they're out working in the open about it; nor is it wrong for a President to call interest groups for policy advice. The real problem is that these interest groups are actively advancing an agenda that goes far beyond "Assault Weapons" or what most Americans would be comfortable with.
These organizations don't say "we will go out and confiscate most guns", they say "let's ban dangerous weapons and have mandatory buybacks", but then "British National Party" doesn't call themselves "National Socialist British Worker's Party" (ditto for "Golden Dawn" in Greece, etc..)
tl;dr It's right to call this a gun-grabbing agenda, even if the Obama had campaigned on the premise of "I won't take your guns" and said that he thinks that "second amendment recognizes an individual right".