Islam has more sects than Christianity. The Prophet (Peace be upon Him) said, in authentic hadhith, that Islam will divide into 73 sects & only one will be upon the right path. So that's what we are witnessing today. Each sect believes they are upon the truth. The only way to ensure you are upon the right path is to follow the Quran & authentic Sunnah & beware of deviations & extremisms. Which is getting harder & harder now!