Regarding Syria, Yemen, Armenia and Ethiopia, perhaps you are right that the atrocities committed there are not given the same atttention in the news (it depends on where you are; in my country, Syria received the same amount of coverage, mainly because we received a large number of refugees from the war).
However, even if those atrocities were given the same attention as the atrocities committed by Israel against the Palestinians, that would not necessarily mean that the latter atrocities would somehow be considered less severe, or that public opinion would turn against the Palestinians. Is that what you would expect?
I should also say that the Palestinian issue has been going on for more than 40 years now without resolution and it's natural that there is more attention paid to it, if nothing else because everyone would like to see the end of it.
In any case, realistically speaking, the occupation is a cause célèbre and there's nothing anyone can do about that, except perhaps ending the occupation.