To put it simply, Islam is the name of the religion - Muslims are the people of the religion. The people of Islam are all Muslims regardless of their home country.
Christians believe in Christianity, Catholics believe in Catholicism, Jews believe in Judiasm, Buddhists believe in Buddhism and.........muslims believe in Islam; doesn't follow does it - they're confused as well, lol
Er, are you on the fundy fringe of Christianity, Tamborine, because the last time I looked, Catholicism was a Christian demonination.
I realise it gets in the way of a cheap jibe, but you might like to be aware that 'Muslim' is an active participle from the same verb from which 'Islam' is the infinitive, so your point is wrong.
Most Muslims only appreciate their own religion.
If you are Catholic, Hindu, Buddhist or of any other religion you are not normal in their eyes.
Its a terrible religion to be part of IMO.