Bowling for columbine?

really its main idea is to understand why wepons are so easy for youth or anyone in U.S. to access

It's Michael Moore's fraudulent take on gun ownership in America. His movies are supposed to be "documentaries", but they are carefully crafted and edited frauds, from beginning to end.

Documentaries are supposed to present, without commentary, different sides of an issue or situation.

Moore's films all present his side.