"gun restrictions only benefit criminals"
All the data from other countries that god rid of guns supports the opposite of this. Show some statistics or stop saying this.
"are you gonna make cars illegal too?"
Ones that can be easily used to kill people? Hopefully, eventually, yes. We already heavily restrict them, license them carefully, track them meticulously, require them to be registered, and constantly improve technology and legal standards to make them less likely to kill people -- unlike guns in America. Soon all new cars will have technology in them to make it very difficult to run someone over with.
"People who want to hurt people also don't care what laws there are, they can buy guns illegally."
So I suppose you're in favour of having no laws at all? Since people will just break them? This argument only works if you're in favour of total anarchism.
Both gun crime AND the overall murder rate dropped substantially since Australia heavily restricted guns in the late 90s [1] - i.e. people don't just switch to other weapons - murder, plus accidental death, actually decreases.
"They've tried banning everything in England and criminals will still kill people with just about anything."
Nope. Not having guns works:
Homicide rate per 100,000 people in 2017 according to UN-CTS:
United Kingdom: 1.2
United States: 5.3
[1] https://crimestats.aic.gov.au/NHMP/1_trends/