Cyclist not stopping at stop sign—am I in the wrong somehow?

I just had the most bizarre experience with a cyclist. I’m at a stop sign and see that a cross traffic cyclist isn’t going to sop even though I have the right of way. So I let him through and slowly start my turn when he’s 70% of the way through the intersection. Somehow he takes offense to…me letting him break the law? He slows way down and gets into the center of the lane to block traffic. So I pull all the way into the other lane to safely pass around him to get away from someone who is clearly having a time…and he starts taking pictures of my car and yelling at me.

Honest question for the cyclists here…what gives? Did I somehow break the social code?