"Trump's words are an incitement to the type of political violence that touched me personally," Rabin wrote
He said that Trump's appeal to "Second Amendment people" to stop Hillary Clinton -- comments that were criticized as a call for violence against Clinton, something Trump denied
-- "were a new level of ugliness in an ugly campaign season."
Referencing his father, who was shot and killed by an extremist amid political tension in Israel in 1995, Rabin condemned Trump's aggressive rhetoric.
"More than one commentator in Israel and in the U.S. has pointed to the parallels between Israel in the 1990s and the U.S. today," he wrote.
"Intentional or not, the Republican presidential nominee is removing confidence in the democratic form of governance. If an election is seen as illegitimate, if those who supported a candidate are viewed as somehow lesser 'Americans,' then it becomes acceptable — and even appropriate — to work outside the political system," he warned.
Rabin continued, "Some critics have called Trump a threat to American democracy. It is not my place to make this claim, and my purpose here is much more limited. But I have been touched by political violence, and have witnessed the environment that led at least one person to believe such violence was called for."
Calling on Republican leaders to repudiate Trump's rhetoric, Rabin warned, "Trump's words are not just words. They can sow the seeds for something much more sinister."