So you're talking more modern history. I don't agree with the way Christianity has been forced on people throughout history. I don't condone the inquisitions, etc.
It saddens me, honestly, at how far from true Christianty most publically open "Christians" are. Forcing your beliefs on others, ridiculing those who don't believe the same as you, and not treating all of humanity with the respect and love the deserve are not actions of a true believer in Christ.
I was thinking more about the things such as animal sacrifices and temple rituals, which were law prior to Jesus. But he did say he came to fulfill the Law, thereby making those practices obsolete since He became the ultimate sacrifice.