Insane is a legal term when someone is deemed unfit to account for themselves and whatever actions for the circumstance(s).

"Insane actions" to be would be doing something that is completely uncalled for in the given situation. Such as at a funeral where everyone is mourning, you tear off the suit and start doing a polka dance and handstands on the coffin. It's something that has no rationale for and does not fit with the situation.

"Insane person" is someone who fits the definition I gave in the first sentence of this post.

Insane actions would not make the person insane. For example, I am sane and if I wanted to, I could strip down at a funeral and do a polka dance and do handstands on the coffin. However, does doing that make me insane? No.

The person would already have to be insane and commit insane actions, however, even then I would not say that the actions made the person insane because that logic is faulty. It would then serve to say, that assuming after I did my polka dancing at the funeral and was presumably insane, then I did behaviors that were rationale and fit with the situation so I'm no longer insane. Everyone does some action or two that is more or less insane, so you'd be flopping back and forth with "i'm sane, now i'm insane, now i'm sane" and so forth.