I have some agreement with you here when it comes to seeing the reflection of what I was myself missing in how people treat their - specifically toy-sized dogs.

it sickens me. It pisses me off. And I am a dog lover! But this sicky treat your little muffin all kissy kissy wussy wussy stuff is irritating. And yes - there are people I've had in my own life who have paid more positive attention to their tiny dogs than me.

I have a second reaction. I don't mean to paint all small dog owners with the same brush, but in my experience small dogs don't seem to garner the same expectations for obedience as a large dog. They seem to be able to get away with a lot more. And this is a big irritant for me - and that causes resentment.

Thus, when I see a very small dog, I feel a strong amount of hate come on.