What about saying- "Allah could even put Shi'ites in Jannah & Sunnis in Jahannum or vice versa." Isn't it absurd to say? Its a simple analogy. How can one person enter into Jannah who calls other muslims as infidels? Disclaimer: I'm not calling any particular group/sect as Kuffar here. I consider them as Kuffar who have corrupt beliefs which nullify their Imaan.