Charliehall Ben Levi has given some excellent responses to your points and I would ad that I do not know exactly what Rav Tendler said or under what circumstances or about what exact situation.
I also do not think that not knowing of any response by other Rabbonim constitutes endorsement by them of everything they do not comment on.
I seriously doubt that Rav Tendler or any other Gedolim would ever support a seculra non Torah government sticking their hands into my pockets and forcing me at gunpoint to give up money that I can ill afford for some “universal” health care’ that will not even cover everyone and which would impoverish me to the point of being forced out onto the street because the government has through legalized theft, stolen my rent money.
150 years ago, no one was refused medical care because doctors would do it for free rather then see a someone suffer and die for lack of care.
It is the excessive overregulations and invasive intrusion into our pockets and private lives that has caused this ‘crises’ in the first place.
What do you think Rav Tendler says about England where women cannot get breast cancer screening because “it’s not in the budget”?
What do you think he would say about Obama telling elderly people who need ‘expensive’ critical care, to “just take the pain pill”?
And Ben Levi you are 100% right in that we must daven and increase in Torah and Mitzvohs because everything is from H-sh-m and there must be something he expects us to learn from this.