Its terrible on many levels.
Firstly, it it is illegal. The EU Constitutional treaties, aswell as the Convention on Human Rights forbids rejection or refoulement of those in danger in their own countries. Nick Griffin wants to send those who have fled war or threat back to their own countries
Secondly, it is racist. He wants to give grants to British Citizens who are not of British descent to go back to their parents' birth lands. This would include many of my friends whose parents or grandparents are first-generation immigrants.
Thirdly, it is economically unsound. Immigrants are net contributors to NIC, have higher levels of productivity, reduce wage stickiness, clear the labour market and stimulate growth.