Everything that happens is part of God's plan.
Atheists are speaking out against religion.
Therefore, this is part of God's plan.
Do theists have the right to complain?
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On the flip side,
Some religious people will complain that they aren't getting special treatment (immunity from criticism, for example).
Even if their complaining is a part of their God's plan (as everything is)...
Atheists don't believe in their god so don't actually have to pay any attention to that argument.