We are all bound to follow a way of life. Now that way of life, is it true or not? The one that we worship is either true Creator that deserves worship or not. So this is where Islam came from day one to reconnect us back to the true way; So reconnecting us to the true way of life, and to the One that deserves of worship.
Islam’s essence is Tawhid (The belief in one God), is to know who your Lord is. And a lot of the times, a lot of these issues come from this. Any issue that you mentioned to me, the root is Tawhid.