Why do some people hate vegans that are critical of promoting Welfare "reform"/SIC's

Another post I wrote in the parallel discussion thread on a Facebook-page where vegans who oppose SIC's are critisized; and some people hate vegans who oppose SIC's:

I agree with the principles of Abolitionist veganism. This doesn't mean that I agree or condone with all of how any person acts on their Facebook-page. You need to be able to differentiate between principles and persons advocating for these principles.
I think it is profoundly sad that you compare other vegans to the hateful "Westboro Baptists". You criticize others of a behaviour you don't like, but then you restort to hating other vegans who have spent thousands of hours of educating non-vegans about veganism. How can you criticize others of being demeaning, when you are doing it yourself?

It is possible to be critical of other people's approaches, without hating or demeaning other persons. We can have arguments based on substantial arguments and still be friends.
I think anti-fur-campaigns are problematic based on the following reasons: http://bloganders.blogspot.no/2014/05/the-problem-of-focusing-on-anti-fur.html
I still think that people participating in these campaigns are well-meaning people and doing their best to fight for the animals. I just think that we always should advocate veganism, and not confuse nonvegans to believe that their is a moral difference between fur and other animal exploitation. After all - if we want people to go vegan, we shouldn't contribute to their speciesist confusion.

Does vegans love or hate people consuming meat, diary and other animal products?

Some person claimed that we shouldn't feel sad if a person exploiting animals on a regularly basis die. All non-vegans are exploiting animals on a regularly basis for palatable pleasure/convenience.

Despite that I for a long time have tried to live a moral life, it took me almost 28 years to realize that it is wrong to kill animals for food, and that veganism is a necessity for an ethical lifestyle. If I would have encountered arguments like this, I think I would have become a vegan much quicker: http://articles.philly.com/2009-08-14/news/24986151_1_atlanta-falcons-quarterback-vick-illegal-dog-dog-fights

I think that the death of a sentient being always is sad, including the death of humans. I think that we can love someone despite the violence that that person is causing to others, and causing to himself or herself. I would e.g. mourn if someone died of my non-vegan family or friends. I don’t think it attracts our non-vegan friends to claim we shouldn't feel sad if they would die. I really hope it isn’t true that we wouldn’t be sad.

For me veganism has led me to feel more love and empathy to animals, including humans, on this planet. Of course I am deeply saddened by the exploitation my non-vegan friends are inflicting upon the animals, and their inability to demonstrate love and empathy toward the animals that they choose to exploit for animal products, but I can still love them.