good point. So he's just migrating.
Like the Poles were just migrating to the UK.
Whatever immigration policy the Hungarians have is up to them - apart from the EU's free movement of people law which, if they don't like it, they can always do what the British have done and secede from the Union. If the Hungarians want to allow British immigrants into their country even after Britain leaves the EU then that's entirely up to them. It's not Mr Griffiin's fault.
The Hungarians will probably like Mr Griffin (one of my political heroes) - the Hungarian government and people don't want their country flooded by Muslims. They are even building a fence across their border with non-EU Serbia to keep the Muslims out.
And this is an EU Member State building a fence to keep out the Muslims yet, as far as I know, not one EU leader has spoken out against this just as they are speaking out against Trump's wall.