What a lame response. The fact that they believe in Jesus doesn’t make them Christian if the Jesus they believe in IS NOT THE REAL ONE OF SCRIPTURE.
We are talking about different beliefs about the same person, not about two different people called Christ. The definition doesn’t require accepting any specific creed or interpretation. If you want to distance yourself from us accurately, say that we are not orthodox Christians.
James 2: 19. You believe that there is one God. Good! Even the demons believe that--and shudder.