Duke, from what we have gathered so far, we know that he hates Muslims, that alone is an ideological position.  We know this because eye witnesses quoted him saying "I want to kill all Muslims".  Over the weekend, he referred to another Muslim as an "inbred" and has been kicked out of pubs for "cursing Muslims".  His Twitter account also followed leaders of the far-right incl. the political party, Britain First whose missions statement is “We will restore Christianity as the bedrock and foundation of our national life as it has been for the last one thousand years.” I'm sure we'll learn more in time. https://www.theguardian.com/uk-news/2017/jun/19/finsbury-park-attack-suspect-named-as-cardiff-resident-darren-osborne