Try this on for size:
Prior to His crucifixion, Jesus revealed to His disciples the future hostility they would face and encouraged them to sell their outer garments in order to buy a sword (Luke 22:36-38; cf. 2 Corinthians 11:26-27). Here the "sword" (Greek: maxairan) is a dagger or short sword that belonged to the Jewish traveler's equipment as protection against robbers and wild animals. A plain reading of the passage indicates that Jesus approved of self-defense.
Self-defense may actually result in one of the greatest examples of human love. Christ Himself said, "Greater love has no one than this, that he lay down his life for his friends" (John 15:14). When protecting one's family or neighbor, a Christian is unselfishly risking his or her life for the sake of others.
Now, as for asking street LEO, they are risk-averse by nature & pretty much have been elevated by laws & the liberal agenda to a privileged warrior class or a samurai. They don't want you armed because it threatens them. How much law enforcement (or how many agencies) would you need if all moral, honest, law-abiding citizens carried & common sense legislation enacted? I can tell you this, not as much as is currently in service. Police departments, federal agencies, special/company police, limited jurisdiction agencies (like North Carolina State Highway Patrol which can only give tickets & have control over state & federal highways inside NC but are not really cops, or the DEA [if self-abuse was made into a freedom, oh wait, it is if you like alcohol & cigarettes]. We'd be down to just Sheriff's department, state Departments of Correction, the U.S. Marshals Service, & the Bureau of Prisons (maybe a State police, maybe). However, this is not the case & probably will never be.
Thus, the armed citizen is a threat to the job of law enforcement, they like their privileged status & don't want to be downgraded to just picking up the pieces after the action is all over, they like controlling situations. To a lesser degree in Corrections, taking control of situations is the rule of law. So imagine what it is out there on the street?