There are large groups of "Christians" that aren't - they are readers of the Old Testament not unlike Muslims in that regard. They also have a lot of similar beliefs to Muslims. These are people who delight in using the Old Testament to justify their 'beliefs'. You can actually identify them by their references to "the bible" (and then run like hell before they can getcha!).
I remember once, when I had an employee that went with a group of these so called "Christians". It didn't take her long to figure out she wanted nothing to do with these people. They were driving her nuts. She stopped going to meetings and they staked out her home, called her on the phone every 10 minutes, and stalked her. She asked me what I thought she should do and I told her to goto the police. She didn't think it made any difference but the cops got it stopped. She was actually terrified!
Now they are all supporting Trump and they call themselves 'Christians' - they are not........