The first paragraph should be revised to place the question about gun laws being enacted at the end. The structure of a proper thesis paragraph needs to use an effective hook or introduction. Rather than opening with a straightforward and basic question, use a rhetorical reference instead. Narrate one of the previous shootings and the offshoot of the incident. Then lead into gun ownership and why gun laws should be enacted. That would be a more proper discussion progression for your presentation.
But more things would change and even decrease.
This sentence is out of place in the paragraph. It does not help to inform the reader properly nor add to the useful content of the paper. It can be removed without affecting the overall discussion for that paragraph.
by enacting guns
Enacting what? Guns? Nobody enacts that. You enact anti gun laws, gun ownership laws, gun control laws... There is a lack of clarity in that sentence.