On a counterpoint, PoliGAF/Era is/was also considered one of the worst and most toxic parts of these forums, so it might not be bad for them to have broken up, just not for casting doubt on allegations that people had some reason to be suspicious of given the timing.
I've been posting on this forum (or some version of it) for close to 16 years. I've seen every season of this community, and virtually every type of political discussion here and in those community threads for as long as they've happened. I've never read anyone say those threads were toxic, ever. I've read or seen certain members be toxic, and I've seen that be as a result of certain ideological/political slants requiring extremes or tactical agitating/trolling/shit-stirring as a function of participation. I've seen how that behavior shifted as certain types of public political identification stopped being "cool" online, such that even vaguely talking about it fell (rightfully so) within the Venn diagram of shit that's bannable.
But I've never seen anyone saying the whole of that group and the decade+ of community posting (or posters) were toxic. It actually sucks that this last few months of politics and aggressive trolling/shitposting was the last straw, because that community thread provided tons of good posts and valuable news and information no matter what part of the political spectrum you fell on. Probably the only problem you could have was if you thought political discussion was more about namecalling and "making people uncomfortable" as a rhetorical debate strategy.