ECHR necessarily guarantees the right to shoot some intruders in some situations, but it's kind of impossible to know which situations those are except after the fact.

But you can't use it against someone for just entering your premises illegally. It needs to be a clear and present danger.

You base this on what? I know plenty of gun owners where I live, and most would pull open their safe the moment they hear something during the night. I'm willing to bet most gun safes are located in the bedroom.