Are the sentences grammatically correct and have the same meaning?

Question

That who sees only one side of things gets involved in fights and arguments.

That one who sees only one side of things gets involved in fights and arguments.

The person who sees only one side of things gets involved in fights and arguments.

Answer 1

Favorite Answer

Your last one there is really the only good one, in terms of English style and word choice. 

Answer 2

They are all basically saying the same thing, but they are wonky. They need some help. You could say:

He who sees only one side of things may find himself involved in fights or arguements.The one who sees only one side of things may find themselves involved in fights and arguements.

The person who sees only one side of things may be involved in fights and arguements.