请帮我分析一个句子Most Englishmen,if only because of the natural foma

大多数英格兰人在根本上都会觉得待在低地(英格兰,译者注)比待在高地(苏格兰,译者注)更自在,因为他们的岛(大不列颠岛,译者注)的自然地形的原因。这句话的paraphrase是：Most Englishmen are essentially more at home in the lowlands than on the heights。Each one has his own individual reason for that feeling,but for each one,at least part of the reason is surely the natural formation of their island。‘if only because of the natural fomation of their island’是由‘if only'引导的插入语