If those people were to look at it intelligently, they would notice two things - people who would ignore laws governing murder are not going to suddenly abide by laws concerning guns. Criminals will get and have guns, period. And even if all guns were banned everywhere on Earth, the technology to build guns is simple - I built a zip gun when I was 9. It could fire a deadly round.
The second thing to note is who it is that WOULD abide by the gun laws - honest folks. So what you end up with is armed criminals and unarmed citizenry - predator and prey.
Gun laws make it easier and safer for criminals to ply their trade by taking guns away from citizens who have been made defenseless.
Anyone who doubts this need only look at the statistics of gun deaths per 100,000 population in every area where gun laws are strict (Sweden, Chicago, Washington D.C. etc.) and comparing those to the same rate of gun deaths in areas where guns laws are lax. Sweden has the strictest gun control laws on Earth - and has the highest rate of murder by firearms of any nation, war notwithstanding.
More people are mudered on a weekend in Chicago than in an entire week in Baghdad.
As is true with many things in life, things are not as they appear.It would seem that controlling guns would reduce gun crime, but it has the opposite effect in reality. We should learn our lessons from life. For example, most people believe pain is a bad thing. But the reality is that pain is a good thing - it tells you when something is wrong so you can get it fixed. Without pain, people would bleed to death, not knowing they have been injured. They would die of every disease, not knowing they are infected.
Things are seldom what they appear to be. And gun control is not what it appears to be.