At the BNP's campaign launch in Essex, Mr Griffin said: "There's no protest vote like a British National Party protest vote, because all the others are in it together.
"Everyone knows we are the ones that they hate... We are the ones who are really a threat to their rotten, internationalist, liberal system.
"So we are the ones people have got to vote for if they want to protest against what the old politicians - the tired, corrupt old politicians - have done to this poor country of ours."
Outlining his party's anti-immigration stance, Mr Griffin said: "Not all immigrants are terrorists but all terrorists are immigrants or their immediate descendants."
On its opposition to Turkey joining the EU, he said: "While we are in the European Union we most definitely, and above all else, oppose its expansion to bring 80 million low-wage Muslims into Christian democratic Europe."
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