Would it be bad taste for a gun store to have a

[gejohnston]

3. After the Westgate Mall attack in Kenya

the Secretary General InterPol at the time came to the opposite conclusion.

As Noble explains, his 14 years of close involvement in global counterterrorism changed his perspective on gun control. This week, he has published a video about the 2013 mass shootings at the Westgate Mall in Nairobi. The video, “Armed Citizens Can Help Stop Terrorist Massacres Like Nairobi and Paris,” shows graphic footage of the attack and of the response of armed citizens. During the lengthy and well-planned attack, more than 60 innocent people were murdered. As Noble explains, the death count would have been hundreds more if not for the armed citizens who intervened. As Noble puts it, “This is not an American argument, nor a political argument. In these horrific situations, law-abiding armed citizens have helped protect others and literally saved lives, and the world should be made aware of this reality. . . . In the hands of law-abiding citizens, guns can and do save lives.”

https://www.washingtonpost.com/news/volokh-conspiracy/wp/2016/05/17/good-guys-with-guns-former-interpol-chief-ron-noble-on-the-westgate-mall-mass-shooting/
As criminologist Gary Kleck once said, it isn't the number of guns, it is who has them.