What's the point of the 2nd amendment when the police has tanks and urban assault vehicles and your government has nukes, fighter aircraft, grenades and several

What's the point of the 2nd amendment when the police has tanks and urban assault vehicles and your government has nukes, fighter aircraft, grenades and several other materiel? I've never understood how self-identified "patriots" support a militarized police force and the 2nd amendment. The government, at all levels, literally has the power to do whatever they want. We need to at least demilitarize the police.