The first is clear but wordy. E.g. ‘Mobile phones are isolating.’ The idea being expressed in the second isn’t that clear and the grammar is wrong. It seems like you are trying to say more than can fit in a sentence, but I’m not sure.

Hi, I'll make a few grammatical suggestions to your text: Due to mobile phones people are isolated/ separated from each other. People need to help each other, either for their own sake or religious beliefs. Emma also gave a great suggestion. Use her suggested sentence if you want to communicate why people help each other, or use mine if you want to convey the need to help people for our own sake or religious motives.

Hello! The first one makes perfect sense, good job! The second one is a little unclear. I think you mean to say "People help others, either because it benefits themselves, or because it's part of their religious beliefs." Does that make sense?