How would one destroy a star?

In a lot of sci fi, a common plot theme is the destruction of stars. I am curious using our best guess at physics, how would that realistically occur?

The sheer size and relative stability of a star vs any matter of inputs makes me dubious its even possible other than using stellar mass objects or levels of energy.

Or a very very very long period time scale of feeding off the plasma and slowly shrinking the stars size till it becomes a white dwarf.