Sorry. Free speech is absolute. Criminal threats should be dealt with by law enforcement. That's it.
Take a read of this article.
This paragraph summarizes the arrogance:
"At its core, this debate is about the conflict between two key human rights; freedom of speech and freedom from discrimination."
"Freedom of speech is the cornerstone of our democracy. But like most human rights, it is not absolute."
"Our laws limit our speech and expression in many areas like defamation, false advertising, censorship and threats to kill."
challenge is where to draw the line between protecting free speech and
protecting against the serious harm that can come from some speech."
BACKGROUND HERE, please read.