It's rubbish is it? You're talking abut a man who has said on many occasions that he'd rather stay in the EU than go for a deal that gets Britain out. THAT'S how principled he is.
You;re making the huge mistake here of taking a feller like Farage at their word on the offers they make. He is a gigantic ego seizing on political turmoil to advance his own power grab. He's a populist politician that sees the bigger picture of the breakdwn of scoial democracy and wants to get in there and call themselves king of the world (see Salvini, Berlusconi, Trump, Le Pen, Macron, Orban, Wilders....).
He uses Brexit, that's his vehicle.