That's what Islam is about..stick to your beliefs and hold onto your eemaan. However when it comes to advising there are methods in doing so. Manhaj is as important as Akheeda bro...The Prophet preached Thawhid for 13 odd years,from what I memo Allahu alam, before he got onto other matters. If a person's akheeda is not of yours then how will they ever agree with your manners and beliefs? Will they not reject it then?