Avialans are part of the Dinosauria classification, yes. The problem is that that not even all Avialans are "birds", let alone all dinosaurs. So, yeah birds "

Avialans are part of the Dinosauria classification, yes. The problem is that that not even all Avialans are "birds", let alone all dinosaurs. So, yeah birds "descended" from dinosaurs, so did a lot of other stuff. I don't think anyone disputes this.