Is it worth it to have a cost of some deaths every year so that we can have the Bill of Rights? Yes, it is. If you think that makes me callus, you need to develop a thicker skin.
Since GP also made the typo, I don't know if/to what extent a joke was intended here.
(The adjective, here intended to mean "emotionally hardened", is "callous". A callus (noun) is a region of literal thickened skin. Although "callous" can also literally refer to skin which has calluses.)
"...cost of unfortunately..." Is that not clear? The context was he was responding about a question about the 2nd amendment. clearly the first order thinking would make it clear it's not the rule, it's the purpose of the rule that's important.
The purpose is so you don't get arrested for some social media comment or other rights, like what is happening in the UK right now.
Note: I believe the 2nd Amendment is really the proof that the founding fathers weren't the super geniuses the mythology has them as, but hey, too late now.
The founding fathers had vastly different ideas for drafting the 2nd.