To be fair, most people learn to pronounce foreign names and words either the way they hear other people pronounce them - and those people are rarely natives of the foreign locale in question - or the way the spelling of the words or names seems to indicate (to them). And in either case, the pronunciation will be influenced by the speaker's accent or dialect.

At present, television and radio journalists are perhaps more to blame than anybody - if an unfamiliar name or word is introduced into the public discourse, they are the ones who most people first hear pronounce it. You would expect them to make some effort to learn the correct pronunciation before teaching the citizenry of a country how to say it. But perhaps that is easier said than done.

When I was young, the only pronunciation I ever heard of "Hiroshima" was "hEE'ro-shEE'-muh". At some point, I heard that the correct pronuciation is closer to "her-AW'-shih-muh". The first, apparently-erroneous, pronunciation is the one that comes naturally to me; I have to make a conscious effort to say the second. It is just plain unrealistic to expect most people to make that kind of adjustment.