He would probably kill any of the cops who pulled shit like that.
The police and military idolatry of Frank Castle has always been so fucking weird. Mostly because in-universe, most soldiers and Marines see Frank as a disgrace and stain on the US military at worst or a rogue tiger that needs to be put down at best. And Frank has straight up killed plenty of US soldiers and police officers, especially in the MAX series, but even as far back as the 90s. I mean, just off the top of my head:
1) He shotgunned FBI Agent Blackwell in the face in front of a news helicopter in the 90s. Fucker had it coming.
2) He drowned a rapist Marine in Vietnam
3) He walked a US General into sniper fire.
4) He left Martin Vanheim to die in Siberia
5) He gunned down a cabal of corrupt Army and Air Force generals in MAX.
6) He sent a corrupt NYPD officer back to the Eastern European HQ of human traffickers with a tape of him killing a man. The officer did not return.
7) He tortured and murdered a corrupt police officer during his feud with the Kingpin in MAX.
8) Under Hate-Monger's "hate ray" (that was some fucking garbage, fuck you Fraction), he murdered his partner's journalist girlfriend.
9) He threatened to murder the President of the United States to his face.
10) He blew up a fucking nuke.
I'm sure there's a few others.
Edit:
Oh yeah, there was also that time he gunned down a murderous priest with an M-249. I actually think that bit of Welcome Back, Frank is an important look into his character.
So there are three guys, a murderous priest who starts killing people cause he thinks God wants him to, there's a rich dude who starts murdering addicts and transients to keep his neighborhood clean, and there's this one douchebag trying to fight the system by killing corporate white collar criminals, and they decide to team up because they idolize Frank and want him to be their leader. He flatly declines and says very simply:
To the priest: You're a lunatic.
To the rich dude: You're a Nazi.
To the douchebag: You're sloppy and you murdered innocent people in your rampage.
And that's why none of them could be like him, cause it's a fucking comic book and Frank Castle never misses or directly kills innocent people or murders people cause they make the streets dirty.
Anyways, he just guns them all down.