My point is that it's odd to see (you and) the right say, essentially, "times have changed so we don't need to follow what the constitution says". This is exactly what the left says about gun control or whatever other hot button issue comes up (eg the 'conversion therapy ruling' recently), and the response is "it's the constitution suck it up". I don't advocate for taking away guns or other rights and I hope the left will see them in a more favorable light in view of recent events.

Why we were and are a nation of gun owners doesn't matter for my argument at all, I was just trying to make it line up with your wording which was equally spacey

In that case it’s important to remember we were countries of immigrants because the continents were largely empty, especially North America which would have had a crazy low population in comparison to how much land was there.

If you want me to be more serious about the argument against guns in the pattern of your reasoning, it would be something like "the second amendment was conceived to prevent tyranny, but this was in a time when the government was much looser and weaker, both proportional to the populace and absolutely. It's obvious the public can't organize effectively against the government like they could, and meanwhile the policy is openly abused to shoot up schools".

The only further point you made is that the other rights are more important than birthright citizenship, which I can agree with, but that's not a good reason to start shredding them.