[Tdol]

Identity is defined as when you ask yourself "who we are and with whom we fit". - Isn't it the answers to these questions rather than the question itself?
and racial identity- delete 'and' and put it before the last item in the list
"relating to, or belonging to a nation as an organized whole"- you are quoting here, but don't give the source.
I disagree with them because national identity and ethnic identity gave me facilities, protection, language.- That's your opinion, but it doesn't say why they are wrong, if they are, to think the way that they think
The national identity- delete 'the'
provide for us- delete 'for us'
there are no safe- is no safety (also, the military are normally to protect from outside dangers more than internal, which is the job of the police)
provide strong military- a
my country government- country's
culture heritage- adjective
Furthermore, when I or my sibling will marry we check the ancestry of the person who we will marry.- this point is not connected to your argument- why do you check and why should you?
emirates- the Emirates
shows for us who you are- shows us who we are