Are my concerns justified or not? could something bad happen , I feel that all this BitcoinXT story and the censorship about it on Reddit etc ... will make bitcoin die just like that
Yes, something bad could happen, but bitcoin can and will likely bounce back from this uncertainty. I think this mess is going to affect the price and the biggest issue for me is if people who switch between bitcoin and bitcoinXT will be roughly split so it's kinda 50/50 adoption, and that I think will cause the biggest problems. Hoepfully xt will fail and die off though and not bitcoin.