in the 1960s the dems controlled congress, senate, and the White House. But crime became a weakness for the dems and the black race riots gave Nixon and other Republicans an opening to attack a liberal supreme court, and liberal dems who didn't seem much interested in doing much about the rising crime rates
so the dems came up with a strategy using the assassination of JFK first and later the Robert Kennedy and Dr. King killings. They started using GUN CONTROL as a SHIELD against the GOP attacks. By adopting GUN control the dems could claim they were tough on crime without upsetting a big bloc of their constituents. The Gun Control Act of 1968 was their crowning Jewel is this effort
up to then, the NRA was mainly a group that trained police, hosted competitions and other such things. But many members of the NRA were able to see the dem strategy for what it was-a political ploy that had no real basis in public safety but rather a strategy that the dems were using to defend against the soft on crime GOP attacks
so the NRA and other gun groups objected publicly and loudly. They pointed out the real motivation of the dems
MORE IMPORTANTLY, the NRA and other shooting organizations got organized and political. They started lobbying and supporting pro gun candidates
this really pissed the dems off. The anti gun dems-those in the big cities where crime was out of control-realized what a formidable foe they had created with their attempt to ward off Nixon's attacks. Dem gun control schemes were introduced to harass gun owners and gun groups. How do we know this? because if you listened to the debate on the Clinton Gun ban, most of the supporters whined about the NRA rather than criminals.
The AWB and other proposals by turds like Chuck Schummer were nothing more than attempted payback against the NRA
and its fun watching people who have no clue on this issue whine about what I know.