Co worker tried to publically shame me for being kind to a customer because they “didn’t look like they were gonna buy anything!!” Why are sales people so ruthless??

Had a customer come in who had booked with us previously (co worker didn’t know this). Customer was so happy and wanted to talk about how much they loved their product….I was happy to listen and enjoy the talk. Small office so co workers listen in on everything…

My coworker sent a message in the group chat making fun of the customer and making fun of me for “loving the conversation” and said thinks like I may as well get his insta… and then he said “he’s not even going to book anything why is he still talking to him”. This is the group chat that EVERYONE in the office can see. Made me seem unprofessional and like I was just enjoying chatting and wasting time….. our manager is in this chat.

I found this so rude. I was listening to a customer who had spent 10k on a product we had sold him. Of course I’m gonna be there for him. Turns out he also wants to purchase another product with us.

Why did my co worker feel the need to make fun of the customer and of me?

I just replied saying actually he has already booked a product that cost 10k which is why he is here (he is an existing customer actually!!!) and he wants to book another product soon too with us…..

I think the conwokrer judged him for how he looked and thought I was wasting time talking to him. Even if he didn’t wanna book it costs nothing to be kind….. omg sales people are so ruthless