Yes, telling someone "you're a demon" can be considered offensive and hurtful. Referring to someone as a demon is a derogatory statement that implies they are evil, malevolent, or possessing negative qualities. It is disrespectful and can deeply offend the person you are addressing.
Using derogatory language can harm relationships and create unnecessary conflicts. Instead of resorting to hurtful remarks, it is better to communicate with others in a respectful and understanding manner. If you have an issue with someone or disagree with their behavior, try to address it calmly and constructively, focusing on the specific actions or behaviors rather than making personal attacks.
Positive and respectful communication is essential for maintaining healthy relationships and promoting a positive environment around you. Treat others as you would like to be treated, with kindness and empathy.