Maybe we’re cat people?
In all seriousness though, I don’t think it’s anti-dog sentiment as much as it’s anti-rule-breaker sentiment. Most of us have no issue with legitimate service dogs. Beyond being allowed under the law, they are legitimately helping someone in need. It’s the people who bring their pet dogs onboard under false pretenses when the rest of us aren’t allowed to do that.
It’s not that same as retail stores that allow pets as they would also allow me to bring my cat in if I wanted to but HAL would not because he’s clearly not a service cat (as he can’t be according to the ADA laws). Not saying I would, but I’d be allowed to bring him to a place like Home Depot just like the women with the stroller dog.