Asalamualikum sheikh, I heard it's haram to greet a non muslim if there is no purpose or necessity according to sheikh ibn uthaymeen, does this mean that I can't have small conversations with my co workers like how their day has been or joke around? Or is there ikhtilaf regarding this matter?

Ustadh AbdulAziz al-Haqqan

Interaction should be limited to that which does not cause harm for you in your religion. So you protect your religion first and foremost.