There is no way the ark would harm a Christian. The ark symbolized God's presence with His people. If you are a Christian you are indwelt by the Holy Spirit (God), and therefore are already in God's presence.
However, should it be found, a Christian should treat it with great respect. Some think it is the finding of the ark that will trigger the Jews to build the temple. Exciting times are ahead.
Puhleeeeze! It killed two of Aaron's sons (you know, Aaron the first High Priest, brother of Moses) and several others who touched it over the centuries. No one is immune.