Technically Kimi made 2 moves, so if anything he would and should get a penalty.. He made one half arsed defense by being a car width more than normal to the inside, and only after Perez had started his unrecoverable divebomb into the gap Kimi had left did Kimi make his second move and completely drive Perez into the wall
I'm not justifying Perez's divebomb, which was a good effort considering he'd pulled it off on two others, but the contact was Kimi's fault.