Most religions are pretty scary, sexist and generally a bit weird if followed 'correctly.'
The nice Christians/Muslims etc I know who would protest that it's all about love and tolerance, well they're all really nice people, but they're not following their holy books to the letter, are they? They're following the saner parts about charity/not hurting folks and ignoring the batshit crazy stuff about murdering those who wear clothing of mixed fibres (Leviticus, if you're interested) killing witches and homosexuals and how to treat their slaves.
The modern, progressive bits of various churches conveniently (and thankfully) ignore the battier parts of their holy books. Leviticus, for example, probably makes sense if you're trying to keep several thousand warriors safe, untouched by food poisoning and away from the camp follower/sex workers in the desert a couple of thousand years ago but it's not terribly relevant if you live in a semi in Guildford.
However, to say that Isis aren't Islamic, or westboro baptist aren't Christian is rather missing the point. Vile as they are, they're sticking to a literal interpretation of their core texts. We ignore that fact at our peril. We are going backwards as far as religion is concerned. Twenty years ago I'd have said that it'd all just eventually fade out as people became more secular, but now I'm not so sure. There are clearly vast, vast numbers of people out there who cannot deal with the complexities of life/critical thought about their beliefs and are happier being told exactly what to think/feel and do, with no dissent, doubt or criticism allowed. These people are easy prey for evangelicals and death cults like Isis.
Just think of George 'God is my copilot' bush, or tony Blair, with their shiny-eyed, absolute conviction they were right, and the power to send us to war. Fucking terrifying.