You seem to be missing the point.
It's not about the suspicion, it's about the methods.
She has a right to want justice. She shouldn't be carrying out that justice through the death of innocent magi, more so without valid proof. She saw what could have been the work of a single Sunreaver, and now the whole faction is getting brutalized by her own magi. The reason I say she is becoming the Alliance Garrosh is because her action are heavy-handed and not really seen through in any way that would be deemed respectable. Remember, this is not some random Horde outpost, these are the citizens of her own new city, lead by one of the Council of Six. It would be like a member of SI:7 decided to work for the Horde and helped feed them information, and suddenly Varian finds out and throws Mathias Shaw and all his men in the Stockades, cutting down any that try to escape. (And SI:7 has worked with the Horde in the past). Dare I say she is doing what Garrosh did to her at Theramore, lashing out versus a group because she can't see people, only a flag that now represents her enemy all the innocents be damned.
Also, I would not really call Varian "genocidal". Just because he was being mouthy with Thrall does not mean he wants all the orcs to be dead. He even let Varok Saurfang collect his son at Icecrown because he respected him. He is not entirely without merit. (Metzen even said that during the upcoming Orgrimmar Raid, Varian will be shown saving orc children to help starve off a lot of the image he developed during WOTLK.)
She has a right to want justice. She shouldn't be carrying out that justice through the death of innocent magi, more so without valid proof. She saw what could have been the work of a single Sunreaver, and now the whole faction is getting brutalized by her own magi. The reason I say she is becoming the Alliance Garrosh is because her action are heavy-handed and not really seen through in any way that would be deemed respectable. Remember, this is not some random Horde outpost, these are the citizens of her own new city, lead by one of the Council of Six. It would be like a member of SI:7 decided to work for the Horde and helped feed them information, and suddenly Varian finds out and throws Mathias Shaw and all his men in the Stockades, cutting down any that try to escape. (And SI:7 has worked with the Horde in the past). Dare I say she is doing what Garrosh did to her at Theramore, lashing out versus a group because she can't see people, only a flag that now represents her enemy all the innocents be damned.
Also, I would not really call Varian "genocidal". Just because he was being mouthy with Thrall does not mean he wants all the orcs to be dead. He even let Varok Saurfang collect his son at Icecrown because he respected him. He is not entirely without merit. (Metzen even said that during the upcoming Orgrimmar Raid, Varian will be shown saving orc children to help starve off a lot of the image he developed during WOTLK.)