> Likewise for the environment - the right tends to deny climate change is even happening, so how do they support environmentalism?
That answers itself - if someone doesn't believe in a threat, it doesn't make sense to invest in stopping it.
> Can you give me one right-leaning healthcare or environmental "plan" that anybody in congress is pushing that will cover every American 100% for healthcare, drugs, mental health, dental, etc?
If there were exactly 2 choices, maybe there'd be a point there. But there is a spectrum of choices and no possible future where everyone has enough healthcare. None of the plans on the left or the right are pushing for the extreme scenario of 100% of the economy is devoted to healthcare.
The right wing would prefer the arbitrary standard trades off a little less against the economy, the left a little more. Both those positions are pro-healthcare, and both are arbitrary. You're welcome to your opinion on where the line should be drawn, but someone drawing the line differently isn't anti-healthcare.
> Why do the right also think it's okay to spend 700 billion per year on the military...
US's high military spending basically only goes up. If the left wanted to reign that in, they've had their chances and not taken them. It is a tragedy.