First of all, that doesn't make any sense. Why would Jinbei suddenly said that?
Second, he is talking about Rokushiki and secret agents, "ohh, the Tekkai, now that I remember a secret agent from WG escaped blablabla" clearing reffering to WsW, therefore, the Tekkai part is about WsW as well. It's in the same context, no, the context is about him to be precise.
Third, WsW was in front of Jinbei and Jinbei bounced back the Rankyaku, and that's why behind WsW the pillar was cut. Meaning WsW used it to block the Rankyaku.