ya. In foreign countries, the word bastard is used very lightly. people always say, "you luck bastard" all the tme.
In the subcontinent, the people actually have this habit of reading into these things. If someone is called a bastard, he'll think, "Hey that guy just called me a bastard, which means he is implying that I don't know who my father is. Thats like calling my mother a whore! I have to beat that guy up now!"
This doesn't apply to all south asians, but unfortunately, does apply to a sizeable chunk of the population.
I know i think something like "kya kar raha hai B-C".
Some guys do get real sensitive about it all, my boss (in the last job i had) was a very very frank guy, he used to call people with very colourfull names, (bose-dk, BC, MC etc. etc.), a guy at work once took such great offense to this that he came back to his desk and started typing his resignation letter.
We told him to give as good as he gets and type the good old DSMCMC letter:
In college this new lecturar from tamilnadu ended up teaching us manufacturing process-I, oh the poor chap, everyone used to greet him with M-C Sir or B-C Sir, and used to rhyme it with good morning sir with a smile on their face, the poor guys used to respond with "yes yes, good morning", till the story got to one of the teaching staff, he learned every little swear word in the book after that.
However every region has its own swear words and ways people use it, while guys often use BC or MC, have not heard any one call out kutiya ke aulad, that will just be weird.