Most people that I know that don't own firearms are not necessarily opposed to them, they just don't feel a personal need to own them.
I also find they believe they could legally acquire firearms if the need arose, and it is that belief that I have addressed when speaking with a couple of them in the last few days. Telling them should you need them you will now never have the option to buy modern effective rifles, in fact the most common rifle designs in the U.S..
If our non gun owning acquaintances ask how does this law affect them then tell that, and while perhaps hyperbolic also remind them that the same Governor who suggested they house illegal aliens in their home now wants to make sure they don't have access to firearms in the future. A future where a "suggestion" can become a decree.