If you can, help others; if you cannot do that, at least do not harm them.
If you have religious faith, very good, you can add on secular ethics, then religious belief, add on it, very good. But even those people who have no interest about religion, okay, it's not religion, but you can train through education.
Out of 6 billion humans, the troublemakers are just a handful.
I grew up in the South under segregation. So, I know what terrorism feels like - when your father could be taken out in the middle of the night and lynched just because he didn't look like he was in an obeying frame of mind when a white person said something he must do. I mean, that's terrorism, too.