Jamaat Salaah and Imaamat

Standing in the saff alone

Q: My question is about a random salafi brother that came up to me after Salah and he is like you should not have stood alone at the back your Salah is not accepted. I believe its Makrooh to stand alone in a Saaf. There was no space and later someone joined as well. I just wanted dalil for my self not for anyone else. I got very irritated because I could see he was just bringing up issue after issue. Allhumdulilah I read your fatwas everyday, he went on after that talking about where we place our hands and he was like Walahi the hadith is daaif about Ali Radhiallahu anho. I was so shocked he was taking Qasam on everything. I have read proofs from your website about the hands. My main concern is my intention. I am going to be starting Alim course soon. Could you explain the type of intention I should have when studying and coming across people like this. I know everything is for the sake of Allah. But I felt very angry towards this person more then anything and I had this feeling which was from shaitaab to prove him wrong.