He has 'aligned himself with' the protesters. [=he has joined the protesters]
The storekeeper carefully 'aligned' [='lined up'] the cans on the shelf.
He 'aligned' the two holes so he could put the screw through them.
(..) I miss you, Daddy. I wish we could get back the time that was stolen from us. My father would love to have seen this. Tonight Pluto and Neptune align with Uranus. It's the first stage of the alignment of all nine planets culminating in a full solar eclipse. It only happens once every years. (..)2001 Lara Croft: Tomb Raider