I'm not the one denying factual datas, you are.
I've done the work to educate myself on this conflict, now its your turn to learn some new sh*t.
I would start by stopping to defend a governement that call a population (men women and children "animals" or "terrorists". You are currently on the side of the fascists mate. Time to wake up.
The worst things, is that you defended the inexistence of those atrocities so much, that its impossible for you now to admit that they are real even if you witness them yourself with your own eyes. Because it would mean that you were on the side of those who committed genocide, the side of people acting like monsters.
That's you dilemma..
Luckely, you are talking to a guy that will only start to care if you do the right thing. Meaning that I'm willing to be kind to you even despite what you are standing for right now if you find the strenght to admit how wrong you were.
You just need to be stronger and don't follow the dark side.
One thing is sure however.. if you keep denying history especially this history ... then history will make you understand that you F*cked up.