I think Kekaro was wrong to say he disrespected Rayleigh, he clearly respected his status and thought he shouldn't be helping the strawhats but Kizaru was also telling him that Sentomaru and the pacifista's would be able to deal with the SHP, which is probably what would have happened if it weren't for Kuma. Kizaru than has to deal with the fact that his entire plan got ruined by his "ally". Which only makes sense, since the CD's would be on his ass for letting Luffy escape, and Kuma's powers are inherently pretty frustrating if you think about trying to arrest someone and they end up on the other side of the world. It's not like we see Kizaru seething with rage when characters can fight or overpower him usually.

