50/50 success implies the anti-gun/gun-control supporters are openminded. That's so far from the truth, it's not even funny. They have their beliefs and agendas, and nothing you can say will sway 99%+ from their stance: GUNS ARE BAD, AND THE US WOULD BE BETTER OFF BANNING ALL OF THEM EXCEPT FOR MILITARY AND POLICE.
You might say they believe in what they know, and preach what they believe.
Politicians have gone so far as to say, "If I could have, I would have said, "Mr and Mrs America, turn them all in." Also, Retired and now deceased Supreme Court Justice John Paul Stevens was written about:
So reformers should take drastic action, Stevens wrote, to “eliminate the only legal rule that
protects sellers of firearms in the United States — unlike every other market in the world. It
would make our schoolchildren safer than they have been since 2008 and honor the memories
of the many, indeed far too many, victims of recent gun violence.”
I’ve argued that repealing, or at least reinterpreting, the Second Amendment should be
part of a bolder progressive agenda on guns, one that enables policies that reduce the
number of firearms in the US. Right now lawmakers are tied by the Second Amendment in
how far they can go, even as the research shows the US leads the developed world in gun
violence largely because it has so many guns — more than any other country in the world —
and maintains lax means, legally or otherwise, to obtaining those weapons.
These people in positions of power and legal authority give regular people confirmation that their ideas and agendas are not only righteous (SAVE THE CHILDREN!), but also may be tame compared to what NEEDS to be done.
There are plenty of videos of both celebrity and unknown types of people accepting invitations to go to a gun range and shoot for the first time in their lives. The conclusion is always, "Well, I did learn that a lot of what I thought I knew about guns and gun safety is just plain wrong, BUT it still doesn't change my mind about needing to reduce the number of guns in the US."
You say "10% is better than nothing." Wrong. 10% is the same as nothing. If 10% of the gun haters suddenly started liking guns, that only means there are more law abiding gun owners getting screwed over by Bloomberg's big money funded anti-gun groups.