The thread has long back reached its logical conclusion and there is nothing more to be said on both sides. Right or wrong, cow is considered a divine incarnation and it is thus sacred to hundreds of millions of Hindus all over India and hence killing it infringes on our sentiments.
We respect the sentiments, however flimsy, of other religious groups and we expect the same in return.
Sure not all Hindus are abhorred by it...that's cool. But that is just a minority. Most of them consider it a taboo and hence better left untouched.
Want to eat beef ? sure go ahead, cook in your home or go out to a restaurant, have it to your heart's fill (provided beef is available subject to state laws). But parading that in public in order to prove something, well they are just asking for it and better not cry when they get it.
It's not just aa cultural practise but which one which is mentioned in religous texts too.
Wrong analogy.
Sorry for the occasional slip-ups in grammer.