Conservatives should admit they think a certain number of mass shootings and successful suicides is worth it for enjoyment of firearms and potential resistance to tyranny. Liberals should admit they want to take away peoples guns and will not be satisfied with tinkering around the edges.
Closing the gun show loophole will not do very much to solve the problem of people shooting themselves and others with guns. Basically, the more guns a country has the more people die to guns. So if you want to really make a dent in people dying to guns one cannot just, take away the guns from “bad guys” one has to take away a lot of guns. But as we can see from mass shooting from Aurora to San Bernardino and the countless suicides in between not taking away a lot of guns will lead to a lot of dead people.