Wow, I think that is the most false post you have ever made.

Varys carried out Robert's orders to have Dani killed. The wine merchant's poison failed, but Varys is in no way working for the Dothraki. LF just wants power for himself, he couldn't care less about peace, and as far as everyone in Westeros knows, the Dothraki are not a threat as they do not have ships and have never crossed the narrow sea.