Hitler didn't even want war with Great Britain. He was desperate for a peace deal with them which involved nothing more than ceasing hostilities between them, but Churchill would have none of it. Churchill could have easily saved Britain by merely ceasing hostilities against Germany. Instead, he aligned with Jewish influence to bring the US into it against Germany.
Read Churchill's War by David Irving.
Hitler knew that the UK had pledged to go to war with Germany if they invaded Poland. Maybe he thought that they were bluffing and that PM Chamberlain would back down like he did with the Munich Agreement after Germany annexed the Sudetenland portion of Czechoslovakia. If Hitler hadn't wanted to go to war with the UK, he wouldn't have invaded Poland. By appeasing Hitler, the UK and French emboldened Hitler to keep breaking the terms of the Versailles Treaty and annexing neighboring countries.
