You don’t need a 24’ Cross to show your a Christian. Your actions should portray that... and this guy needs to rethink his outreach.
HUH?
Did the guy say he needs it to show he is a Christian?
Who are you to judge his outreach?
If you do not agree with it no one is saying you need to erect a Cross.
Sometimes God has his own way of saying “that’s tacky”.
http://www.wdtn.com/dpp/on_air/sunrise/giant-jesus-statue-burns-to-the-ground
If Christ is telling him to park in the other person's lawn and build bigger and bigger crosses everytime that person complains... then, by all means, listen to Christ and do it.