US campus protests give Trump a target for his violent rhetoric of vengeance

Tough-guy talk about radical-left lunatics' is an extreme spin on an old playbook but plays well with his Republican base

Donald Trump delights in railing against his enemies, and when protesters set up encampments at college campuses nationwide to decry Israel's invasion of Gaza, the former US president gained another useful antagonist.

For some observers, Trump's language is both dangerous in the current political environment as he seeks to rile up his base and a dark hint at how he might treat dissent and demonstrations should he defeat Joe Biden and achieve his ambition of returning to the White House in 2025.