I agree. Some people struggle with empathy, and they can't wrap their head around people being sensitive to the needs and concerns of animals. They dismiss those who are compassionate, because they haven't experienced the same insightful feelings.I find that most people who are interested and dedicated to the idea don't need to be convinced.
Those that push back hard are unlikely to be convinced
It's easier to renounce someone else than wonder whether you're missing something within yourself. And, if those people are threatened by the notions of empathetic people, it's hardly a surprise that they'd continue to view animals as something that exist for their advantage and/or pleasure ... sometimes with increasing vehemence.
I grew up surrounded by farmers and hunters. None of them ever questioned if they had a right to make any of the choices they did for those animals. Heck, I got in trouble with my grandfather for talking to 'his' cows and petting them through the fence. He thought there was something wrong with me that I insisted the cows were smart and that they liked me talking to them. My extended family made fun of me for years for thinking I was a cow whisperer, and if given a chance, they'd make fun of me today. They're unchanged and I'm still the 'weird' one.