"But you have no problem taking a paid day off from work on Decenber 25 to honor the birth of Christ, do you?"
Your error is in believing that he is taking the day off to "honor the birth of Christ". The holiday has so many secular influences that one can easily celebrate it without ever mentioning religion. And who cares what he does? He might simply sleep all day or go and get drunk. What's it to you, Stalin?
"As Christians can we complain about tax dollars going for foreign aid to the "Jewish State" of Israel?"
You sure can.