Catholics are Christian, at least according to those of us who are not Christian. It’s like the LGBT+ community: someone is how they personally identify. Even if their behavior doesn’t meet expectations. (Russell T. Davies did a series about this phenomenon, Bob & Rose) If a man claims to be lesbian, than he is. And yes, this pisses off the gold-star lesbians. Anyone who identifies as Christian, is Christian. Full stop. They might not be very good at it. They might disagree with what qualities a Christian should have. They might, themselves, decide you’re not a Christian either. If they belong to a mainline or fundamentalist ministry, they probably think your faith is a deception by the devil, and only by joining their church will you receive salvation. That is more common ministerial position than not. If they’re Universalist, then they don’t care if you’re Christian, you get salvation anyway.