Breaking, as in “breaking and entering”, has a technical meaning and does not require violence. The “breaking” can be any force applied to gain entry, including pushing open an unlocked door. As I recall, under common law, pushing aside a curtain can be a “breaking”.
The idea that you would charge everyone who accidentally opens a door, which they shouldn't have opened, with a felony crime is ridiculous. The definition of "breaking and entering" cannot be defined by the mere action of entering. It must be defined by the purpose for which someone enters.
If there is no criminal intent, there is no crime.