Adam Clarke on John 11:37

Could not this man, which opened the eyes, etc. - Through the maliciousness of their hearts, these Jews considered the tears of Jesus as a proof of his weakness. We may suppose them to have spoken thus: "If he loved him so well, why did he not heal him? And if he could have healed him, why did he not do it, seeing he testifies so much sorrow at his death? Let none hereafter vaunt the miracle of the blind man's cure; if he had been capable of doing that, he would not have permitted his friend to die." Thus will men reason, or rather madden, concerning the works and providence of God; till, by his farther miracles of mercy or judgment, he converts or confounds them.