This law doesn't make it legal to shoot at cops if you think their warrant is bad. Here are the key sections:
(j) Notwithstanding subsection (i), a person is not justified in using force against a public servant if:
...(4) the person reasonably believes the public servant is:
..........(A) acting lawfully; or
..........(B) engaged in the lawful execution of the public servant's official duties.
(k) A person is not justified in using deadly force against a public servant whom the person knows or reasonably should know is a public servant unless:
...(1) the person reasonably believes that the public servant is:
..........(A) acting unlawfully; or
..........(B) not engaged in the execution of the public servant's official duties; and
...(2) the force is reasonably necessary to prevent serious bodily injury to the person or a third person.
Note the distinction between when the use of
force is permitted and when the use of
deadly force is permitted. If you don't believe the cops have a valid search and/or arrest warrant, you might be able to get away with basic physical resistance under clause (j), but unless you reasonably believe deadly force is necessary to prevent serious bodily injury, as provided in clause (k), you can't shoot at them. Basically, what this law does is allow people to (i) physically resist a wrongful search/arrest without being charged with assault and (ii) shoot a cop only in the rarest, most extreme circumstance where he's beating the everliving **** out of you or someone else for absolutely no good reason.
To be honest, I'm not even sure clause (j) permits resistance if you think the cop is acting in good faith. The meaning of the distinction between "lawful execution of...official duties" under (j) and "execution of...official duties" under (k) isn't clear, assuming it was even intentional. If a cop is enforcing a warrant in good faith but the warrant was wrongfully issued, is he lawfully executing his duties or unlawfully executing them? My guess is the former, but who knows. We'll have to see what the courts do with it the first time some yahoo decks a cop with a bad warrant.