If you take the trouble to look into them, not all religions are created equal. For believers, the first question is truth. For a bystander, the first question ought to be, what do they teach? What are their fruits? Contrary to what you suggest, Islam has a long historical record of violence, intolerance, slavery, invasion, forcible conversion, enslavement, and mistreatment of women. Some Christians are guilty of similar behavior, but their religion doesn't teach them that that is right.
If you take the trouble to investigation, you will find that Muhammed himself was a killer, a rapist, an enslaver, and an oathbreaker, but all these deeds were excused and glorified IN THE EARLIEST WRITINGS because they were done to "infidels." Not all Muslims are bad people by any means, but that's usually because they don't fully live their religion or because they are deluded about their religion.
The fruits of Islam through the centuries have generally been ignorance and laziness--men served by four wives and a company of slaves. When they have enjoyed periods of high civilization, it has generally been a matter of living off the remains of civilizations they have conquered and eventually ground into dust. The fruits of Christianity have been a much greater degree of freedom and independence, plus the rise of science and technology in the west that has never been matched anywhere else in the world for more than short periods that were not followed up.