Well that's just scary.
Arianism just about conquered the world.
From an historical perspective alone it's important to know about these men and their beliefs so that we don't fall into the same traps all over again by reinventing the heretical wheel.
And he has reproduced, that is scarier.
Anthanasius had access to no more scripture than is available today...He may be a champion of your religion but your religion is not the champion of millions upon millions of people...
There are no doubt many bible teachers whom I respect who also agree with Anthanasius in some or even much of what he says...But he is not my champion...My champion is Jesus Christ...And outside of Jesus Christ, there is no champion of his church...
We have the perspective of Jesus Christ to guide us in the traps of heresy...So you believe what Athanasius claims...How do you know he is right???