In modern islamic world, there are a lot of movements they pronounce them as they strive for Islam, such as jihadi, tableg, jamathe Islam etc. In your openion how a common/ lay man will know who are these groups and which group is best for him to enganged in.
That group that conforms to the way, manny, beliefs of the Ahlus Sunnat wal Jamaat is obviously the one to adhere too.
Read on our site about Ahlus Sunnat Wal Jamaat.
http://www.alislam.co.za/uploads/Ahlus%20Sunnah.pdf
