It's not the same. Like I said for every person killed in a high profile rampage shooting in America something like 2000 others die without a word. There is a documentary on Netflix by Nova about the mind of rampage shooters. I recommend you watch it. Terrorism and mental health issues maybe be facilitated by availability but not caused by it. It's low hanging fruit for anti gun nuts who to me sound as biased as gun nuts. Unable to separate out the weight of issues and the reality of day to day shootings, terrrorism, and rampage lunatics. Illegal may make things harder but I can tell you from vast experience it makes them far from impossible when you are motivated.
These calculated planned events aren't happening because someone had a gun and lost their cool. Or someone got a gun and decided to go shoot people. No. Rampage shootings are planned and intended to gain attention and fame.