Well, Cian explained his views, the reasons for them and for his reaction. He also apologised for his outburst.

At the time, both Cameron and Lewis seemed to understand- Lewis even thanked Cian for his apology and said he knew Cian was coming from a good place. So it all seemed as if it was laid to rest.

However, later in the episode, despite what he had said to Cian's face, it became evident that Lewis was still harbouring some resentment and was bearing a grudge. Cameron and Cian were definitely back on track at the end of the episode.