I'm going to stick up for my son and make his mom cry
Why are you taking your son's side?
He's been wronged so many times
It's generally a good idea that parents agree with one another and present a unified front for the benefit of children.  If your wife is being unreasonable with your son, you should discuss it with her in private, and not try to make her cry in front of the child.
She's been neglectful towards our son.
If that's true, then she's in the wrong. Parents should be giving their kids a lot of attention.