A Florida sheriff made it clear his county won’t put up with protests that go from peaceful to violent … promising lethal force if anyone steps out of line.

Wayne Ivey — the sheriff of Brevard County, just east of Orlando — spoke at a press conference about the recent clashes between U.S. Immigration and Customs Enforcement officers and protesters in L.A. … and, he used some harsh rhetoric to scare people who might think it’s a good idea to try the same in FL.

Sheriff Ivey leaves no room for interpretation … telling the assembled press that resisting lawful orders, blocking an intersection or fleeing arrest will result in jail time.

As you know … protests against ICE agents and deportations in Los Angeles have raged since late last week. Many federal agents — and 700 active Marines — were sent into the city to quell the unrest.