Wahabism isn't that modern. Going on for c. 200 years. Saudi Arabia is incredibly intolerant (giving someone a bible is a serious offence for example), but as they in general only oppress those within their country, buy our weapons and sell us oil we can be happy about it, or at least not bother about it.

In many ways CHristianity was lucky: the true nut-jobs either killed each other or went to America, and those that wanted to convert the world had a further 3 continents to terrorise. Now all the "weaker" religions have been mainly stamped out there's less csope for Islam to have the same outlet without causing severe friction.