OP (Mengkudulangsat ) expressed problems with sharia finance in terms of investing fundamentals (risk, complexity, etc.).

stealthcat objected to OP raising these points and appealed to authority (variously, Islamic leaders/theologians, foundational religious texts, and God). stealthcat questioned OP's intentions and religious commitment, implying he might not be a Real Muslim(TM) and exhorting him to defend orthodox teachings.

To stealthcat, I would challenge him to consider that many religions are plagued by convoluted rules, to which people come up with hokey workarounds. Orthodox Jews have sabbat elevators; Amish use pay telephones; Sikhs have kirpans (knives) that are impossible to unholster. projectramo's comment about sharia finance obfuscating the principle of interest seems very on-point here.