I would seriously think twice about praying behind those"sunnis" that tend to display traits of kharjiat towards their contemporaries.
I agree with brother Imran, I would not pray behind a kharji like PISSM & co, they can call themself a Barelvi from the tree tops! but it makes no difference to me.
if the arabs taqleed of one of the 4 imams you will read namaz behind them so if a dewbandi tuqleed any of them do you read behind or you believe that they not tuqleed any imams .
Deobandis and Wahabis are 2 different groups which is why I use 2 different formulas for them.
Deobandis say they are strict Hanafis - yet we avoid them on the advice of the Ulama.
Wahabis reject Taqlid altogether. So, for example, you are in Morocco where they are all Maliki but you meet someone who says he doesn't stick to the Fiqh of Imam Malik, then you should avoid him. Simple. Ahlus Sunnah consider such a person to be a Mubtadi - someone who has bida' in his ideology (which is the worst type of innovation)
The second wahabi trait you look for in Arabs is a distate of Sufis. They will act suspicious if you praise the awliyyah and they consider Sufis a different sect from Sunnis ie grave worshippers and "biddatis" (similar to what deobandis say about Sunnis)