The thinkg about this argument that always gets me is that they clearly understand the concept that weapons free zones dont work because people that dont care can just bring in guns from outside. But then unironically say "But Chigaco has gun laws and they have high crime rates!!!!" without ever making the connection.
Chicago has laws which restrict guns, but the city limits directly border on Indiana, which does not. In large part, the guns used in Chicago crime come from just minutes away in the environs of Gary.