Your entire argument is idiotic. A cross is a valid marker for any dead person. Do you actually stop and think, "a cross on the side of the road. This must be a religious statement made by a zealot."? I hope not. I think, "someone died here, and someone or some group cared enough to mark his/her passing". I haven't seen any evidence that any crosses were placed against anyone's wishes. And the whole nazi slant just proves how absolutely baseless these morons' claims are.
I agree with the guy who said, "if it offends you so much, look away." After all, these officers died protecting your sorry, worthless ass.
And just so we don't offend the atheists, we promise to bury them face down with no marker.