Re: "Islam is the only sect"
Go back and relearn what a sect is.
It is not because some misguided islamic extremists have done some YouTube beheading that you should lump all followers of Islam in the same boat.
Scientology is a sect. Jehova's Witnesses is a sect. Any pseudo-religion that attempts to take your money and estrange you from your family is a sect. Any "religion" whose teachings you have to pay to learn is definitely a sect and something to be avoided.
Islam is most definitely NOT a sect. Islam, Judaism and Christianism all hold to the Old Testament. They have that in common.
Now if you want to take only the extremist side of things, you don't need to go as far as Islam. Just visit your nearest abortion clinic and watch the so-called Christians screaming bloody murder threats at the people working there.