Can a Christian follow Buddhism?

My friend is a strong believer in the Lord and always has been. He reads the Bible regularly, has a cross tattoo on his arm and occasionally goes to Church whenever he gets time. But he also carries around a tiny brass Buddha figure. Like a little brown sculpture of Buddha that can fit in your hand. He throws it in... show more My friend is a strong believer in the Lord and always has been. He reads the Bible regularly, has a cross tattoo on his arm and occasionally goes to Church whenever he gets time. But he also carries around a tiny brass Buddha figure. Like a little brown sculpture of Buddha that can fit in your hand. He throws it in his gym bag when he goes to workout, he even brings it in the shower with him in the morning.

Why?
And isn't that considered crossing religions?
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