How can one possibly love God and his neighbor if one is willing to let people die of diseases that God has given us the intellect to cure? That is like walking past an injured traveler rather than lending them aid like a good Samaritan. God gave us our brains for a reason.
Being cured by something created be man is a sin. Same with eating certain foods and wearing certain types of cloth.
It’s like the man who refused to be rescued from a flood, because he had faith that God would save him, then when dies and asks God why he didn’t rescue him, God replies, “I sent you a car. I sent you a canoe. I sent you a motorboat. I sent you a helicopter. What more were you looking for?”
Did all these poor folks dies from the measles? How horrible!