Liberal Democrats and anti-gun Republicans will be looking for ways to divide conservatives on guns, and examples from other countries probably need to be used since most of the high-profile anti-gun Republicans (Bloomburg, for example) have been driven out of the GOP, or at least out of politically relevant leadership positions.
The comment by the author at the end of my excerpt that he doesn't think there should be Bill of Rights because it restricts legislative power is a particularly blunt warning — that is why we need a written constitution (unlike Britain) and a written Bill of Rights that cannot be amended without supermajorities of the Congress and the states.
Bloomburg was a nominal member of the GOP for only four years -- his first term in office.
Bloomy wa s a lifelong Democrat who changed his registration simply to run in the Republican primary for mayor -- he calculated that he couldn't win the Democrat primary. After winning the general election, he was never active in Republican affairs and changed his registration to Independent before running for re-election.