<Look at the acid attacks in London!>
So ... this guy could have killed 59 people by throwing acid from a hotel window?  Could have killed them with a knife?  
<What this is: emotion.>
That seems to be true. However, you needn't be ashamed of your emotional response to this tragedy, but you would do well to add some reasoning to your thinking about it.
Most of the world gets this right; we can, too.  It simply requires us to devise policy and law based on facts and evidence.  You're right: emotion is getting in the way: The reactionary and hyper-emotional hysteria propagated by the NRA and their puppets in Congress is the chief obstacle to doing the right thing. The NRA opposes even studying the problem of gun violence, let alone doing anything about it. Apparently, you do, too.