Why do you care so much about what the media has told you Assad has done? Assad is not and never has been a threat to you or anyone you know. It is a good thing that we didn't get into a protracted war with Syria. It's easy to see the results of our wars in Libya, Iraq, and Afghanistan. The Syrian people are fortunate that they didn't suffer the same fates as those nations. Gabbard's diplomatic mission is at least partially to thank for that.
[EDIT:] This is a really complete explanation: https://www.tulsigabbard.org/tulsi-gabbard-on-syria