Man of Honour
Christianity did not start that way when Jesus died and it was Peter writing some books, that was the Romans who bastardised it and called it Catholicism.
Forget any man made religion but look at the ten commandments and think is this not a good set of rules to try and live by.
1) About half of them are pure authoritarianism. OBEY ME OBEY ME OBEY ME. Or, more accurately, obey the cult leader who claims divine authority for their commands.
2) The rest have diddly squat to do with any religion and were common principles before and outside the rule of the abrahamic religions.
Incidentally, I notice you use the common incorrect translation of "thou shalt not kill". Killing is absolutely fine in the abrahamic religions. It's not banned at all. It's frequently required. That order forbids killing only when it isn't approved by the religious authorities. But that's less important, more of an interesting detail. The core point is above.
EDIT: It's also worth pointing out that the ten commandments predate the creation of christianity by at least 500 years and probably longer. So claiming them as justification for christianity is just plain irrelevant as well as wrong.