And what makes you say that all those who born in muslim families are muslims just because they're born in a muslim household?
This is off topic but anyway...
It's the case with all religions, not only Islam.
Go observe the behaviour of most Muslims, and you'll find out what makes me think that they're only Muslims because they were born into a Muslim family.
Even in Muslim families there are people who one day begin to question their faith. After knowing more about it, they can embrace Islam in a different way than before because after questioning Islam (why am I Muslim, what if it's the wrong religion, would I have chosen it if I wouldn't have been born in a muslim family, why do Muslims do this or forbid that, is this or that really forbidden in Islam or not, etc.) they discover what Islam really is about, they can see Islam separate from their culture and then realise that it really is the true religion. That's what happened to me and I'm proud to be a Muslim.
I'm proud of many things. Like my behaviour. After having been in a vulgar neighbourhood for the last few years, where even my children have learnt vulgar language and behaviour from the neighbourhood kids, I've finally decided not to let it influence my own character and my upbringing of my children. I've decided to remain myself, not become like most of the vulgar neighbours but remain myself and try not to let my children become vulgar like the neighbourhood children (like trying to break our bike, stealing both the bikes of my children, things like that, that's very vulgar). For a while I thought that perhaps we should become a little bit like them, but not in everything, just in one or two things, so it might be easier to deal with them, but I've realised now that I should remain myself and I should raise my children as I was raising them first. We only have very few people in our neighbourhood who aren't vulgar (they don't break someone elses property, they don't steal someone elses property, they don't start fights, etc. there are unfortunately too few people like that in our neighbourhood) I'm proud at myself and my children. I don't care what other people think about us. Most people hate us. But yet, it doesn't matter to me so I'm very proud of that too.
Being proud means (to me) acknowledging that you could to do something difficult.
There is a difference between being just proud or being arrogant in a negative way.
Don't be offended when I say this brother, but you aren't doing anything great If you don't curse, you are only doing something which you are supposed to. It's like a father in a society where kids are raised mostly by single mom's saying "I take care of my kids". Well what great are you doing? You are doing something which you're supposed to, it's your responsibility.
You can be arrogant in a good way? LOL
Instead of being proud about such things, we should rather be thankful to God that he's giving us the power to be decent human beings and good Muslims in the societies that we're living in today.