Nobility implies sacrifice. Cassius, Brutus, et. al sacrificed nothing except the hard-fought stability and foundational reform that Caesar was in the process of providing. If honor can be accorded to jealous rentiers guarding latifundia and Old Money engaging in institutional revanchism, then yes, America should learn from history and what happens to tyrants given time.
As far as hamfisted comparisons between Trump to Caesar go, Trump is no Caesar. He lacks gall, youth, tribute, loyalty, and competence. The only connection he has is the theatricality of those that floundered in the wake of Caesar & Augustus.