I think both and I think the human race is gradually being prepared for first contact whatever that may be or in what form it takes.
Consider recent news articles on extra solar planets, one of them supposedly has the right conditions to support life.
It could be fallen angels and/or holy angels communicating with mankind and either creating/manufacturing these alien craft or casting them so they look real. Or it could be aliens. I don't know.
One thing for sure is this type of event will become more common and more people will talk about it without being labelled a conspiracy theorist.