What makes you think a law prohibiting or limiting Americans from owning guns would curb gun violence?

It wouldn't.

There has NEVER been nor is there a single law that prevents a criminal act.

Rape is against the law.-- Yet, thousands of women are raped yearly. Would revoking the law making rape unlawful increase rapes?

No, of course not.

Murder is against the law.-- Yet, thousands are murdered each year.

Would revoking the law making murder unlawful increase murders?

Again, hardly..

Illegally entering the U.S. is against the law.-- Yet, millions have already done so.

Would revoking the law making it against the law to enter the U.S. a crime increase illegal immigrant entrances?

I doubt that.

Child abuse is against the law.-- Yet thousands of children are abused yearly. Would revoking the law making child abuse unlawful cause an increase in child abuse?

Don't be silly.

Domestic violence is against the law.-- Yet,thousands of cases of domestic violence occur in the U.S. yearly.

Would revoking the law making domestic violence unlawful cause an increase in domestic violence.

No, it would not

I could go on and on.

Normal law abiding people do NOT commit rapes,murders,child abuse acts,incidents of domestic violence, etc. because they are considered against the law. They don't commit these acts because they have respect for the law and have a "conscience". They don't need a LAW telling them these acts are wrong.

Abnormal people commit these acts because their minds are not normal and they have no respect for the law.. They commit these acts DESPITE them being against the law.

Again, no law has EVER prevented a crime.

Make gun ownership in any way against the law.-- Those who want guns of any sort will get them. As of right now, there are 300+ million guns in America. Would this LAW reduce gun crimes?

No, it would only make innocent law abiding Americans who have respect for law vulnerable to those who would obtain guns despite them being against the law.

Also..

In 1994 Bill Clinton made it against the law to have assault weapons.-- During its 10 year span it proved absolutely 100% useless.

Laws do NOT prevent crime. All laws do is provide punishment.

If punishment truly deterred criminal acts; there would be no crime.

But, it is quite clear that punishment is not very effective in stopping crime.

Criminals will not obey laws despite the possibility of being punished.

That's just how human nature is.

Laws...never prevented any crimes.

They never have; they never will.