Every special needs parent says that they love their kid just the way they are. You can see it in the parents' eyes that they're fucking lying, or at least that they're not being completely honest. Stop acting like you wouldn't love a normal child more. I'm pretty sure your life plan didn't involve taking care of your Down Syndrome son every day for the rest of your life.

I knew a kid growing up who had a severe type of Autism. He would yell when he talked, ran around naked, have violent bursts of anger and sadness over the littlest things, picked his asshole in public, jerked-off in class, etc. The stress of raising him literally made his mother's hair fall put and tore apart his parents' marriage.