Because valve has issued a patch which broke everything. Wait for couple of days for them to fix it. You are not alone.
There are a lot of complains about that.
I have the exact same problem, when I go inside the game and choose a server it suddenly freezes and crashes.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.