Jesus answered, “The work of God is this: to believe in the one he has sent.”
1 John 3:21-24
Dear friends, if our hearts do not condemn us, we have confidence before God and receive from him anything we ask, because we keep his commands and do what pleases him. And this is his command: to believe in the name of his Son, Jesus Christ, and to love one another as he commanded us. The one who keeps God’s commands lives in him, and he in them. And this is how we know that he lives in us: We know it by the Spirit he gave us.
If an individual or a 'church' keeps on insisting that we 'need' more than the above; they are the Judizers spoken of in Acts chapter 15.
It's a theological or doctrine difference of opinion. I've read the verses where some churches doctrines come from. But still these are not heaven and hell issues meaning it doesn't take away salvation. The person is shown truth in the next life. IOW I would not fight over that issue and insist someone agree. I might say I disagree and let that be it.