Of course Ireland is for the Irish as is Scotland for the Scots and Wales for the Welsh. Sadly, the Brits wanted to conquer the entire Island. I'm not too versed in Irish history so I cannot comment. I do know that if you do research the IRA you'll come across numerous connections, either for funding, arming or coordinating revolutionary efforts with that of Russia, Cuba, Libya, Romania and of course the PLO.
As for the flag burning, I'd state the usual "Blame the Jew..."