Imagine you make a very secure software that no one can open except the person with a password for it, there’s literally nothing you can do to open it except entering the password, would the features of the software suddenly change when you switch countries? No.

It doesn’t depend on the law, it’s just that Apple can’t open a phone without a password, they don’t have a master key.

This isn't about the law (which Apple will always be compelled to follow.) It's about their capability. Apple doesn't have some secret key. Either this tweet is terribly worded or is missing some key info.