As an ENTP, I find ISTP indifference very upsetting. I don't know why. But I doubt I'm the only ENTP who feels this way.
Interesting. Could you expand? Is this because you're more of an enthusiastic person as an ENTP? I often feel a similar indifference in INTPs... do you agree?
I'll comment more on the OP later, but for now I'm just going to mention one, because I'm lazy. I really respect the ENTJs go-getter attitude, but man it's pretty frustrating that they never admit they're wrong. ESTJs are similar as well.
I have an inner monologue that sounds strikingly similar to something off Animal Planet.
I'm very indifferent to the fact that ISTP's are indifferent. They can be as indifferent as they want and it won't be any skin off of my nose.
I'm going to say that the ENTP was being sarcastic when he said it is "upsetting", but I could be wrong.
When ISTP's have the "I don't give a crap" attitude towards me, I just think to myself, "Cool. Talk to you later now. Buh bye. Oh, and by the way, when you want me to have an opinion on something that is important to you, good luck with that, cuz I'll probably be indifferent also."
INTP: Hey what do you think about X?
ISTP: I don't really give a crap.
INTP: Cool. Talk to you later.
Later that same day:
ISTP: Hey what do you think about Y?
INTP: Don't really give a crap.
ISTP: But, I thought you knew about that stuff?
INTP: I do, but I don't really give a crap. Buh bye!
NTJ's are the only types that have ever made me feel emo.
ENP's are the only types that have ever made me feel like a sensor.
There are two great days in a person's life - the day we are born and the day we discover why. --William Barclay