Will the Regulations criminalise Christians?
No. The SORs are a civil not a criminal law. This means that (with a few minor exceptions) the SORs do not criminalise anyone: they do not create power for the police to arrest people. Instead, the SORs make certain behaviour unlawful, so that an individual[3] can sue someone who they allege has discriminated against them on the grounds of sexual orientation. This is a private legal action generally taken by individuals, rather than a legal action taken by the state.