I find this to be a completely unfair assumption. It assumes autistic people don't have feelings nor can express them, and that we're cold people at best if not downright heartless. Having trouble processing feelings and understanding others' emotional expressions doesn't make us cruel, unfeeling people that can't connect to others. It simply means that we need understanding as to how things are the way they are so we can bond better with others. No one on Star Trek shuns Spock for his lack of understanding emotions - they help him by answering his inquiries to the point where Spock is accepted and forms deep attachments to his crew, especially Captain Kirk.
And as for me personally? I'm not emotionless. If anything, my emotions have dictated my entire life.