Wishing Non-Muslims On Their Festivals
And also celebrating festivals like diwali, holi,halloween,chirstmas,new year etc is no wrong . It doesn’t matter what is the root of these festivals or from which point of view they celebrate it. We have to see in the present moment that is there any shirk or not. If there is shirk we will restrict ourselves. This is what I have understood from the view ghamidi sahab.
Being a Muslims, you have to refuse to participate, now, how you handle it is what you have to think of. you can refuse they way they refuse to partake in the animal sacrificial ceremony on Eid ul Adha.