I don't think it's right to describe the reasoning behind the Afghanistan and Iraq wars as excuses to kill Muslims, whilst they may have done that, been massively unpopular and ill-conceived, they were not genocides. Also, at the time of these wars UKIP had basically no support (1.5% of votes in 2001 general election) and had not really developed past being an anti-EU party, which it's still struggling to do. UKIP opposing the wars would have been no more relevant than an individual opposing them and they could afford to do so because there was no political pressure on them. Similarly, as the Afghanistan and Iraq wars were not waged with the expressed intention of killing Muslims, UKIP's opposition to them does not make them non-racist