When you're a tiny party you need to align with as much other parties as possible. With Le Pen's party being nationalistic and aware of extreme Islam I suppose for FB it makes sense. These things need to be looked at without hype and hysteria. A problem with our main parties in the UK is that they ignore the pride and nationalism that most people feel for their country. They deem it as somehow dirty and unnatural, so any nationalistic party must be vilified as racist, which isn't totally honest. But it's something they'll soon have to address if they want to survive into the future (because neither Tory or Labour are getting much love at the moment).
These little fringe parties like FB are at least addressing real issues that concern people, and I'm not sure how long the other parties can ignore these issues for and convincingly deride these parties as 'racist' before people say: I don't care, I just want less immigration. For example, Boris is saying he will cut immigration but nobody believes him because the Big Business paymasters of the Tories would never allow them to cut cheap labour into this country because they make so much money from it.