1.5 per 100k (most of which are suicides), gun culture isn't big here.

That's why it seems a bit unreasonable to compare how the police in your country would react to how American police unfortunately reacted in this scenario. Because the situations those officers face on a daily basis is completely different. American cops can reasonably expect to regularly deal with armed and hostile psychos, unlike the cops in many other countries. Again, that's not to say that the shooting was in any way justified, but try to put yourself in the life of American police officers.

Yes, that's another good point, and a big factor in why the police there acts the way it does. Yet, even with all the needless deaths, gun culture remains widespread.