Then address what he actually said. He never claimed that all Christians are cruel.
Russell's critique of Christ is first directed against him personally, and objectionable as ignoring and sidelining the purpose of his visit to earth, involving bringing the gift of salvation to all men.
Russell rejects the need for any personal salvation as he prefers sin, and merely carps flippantly at Christ, such as his cursing of the fig tree without figs, whilst failing to understand the teaching connoted that men also will be cursed if they fail to bear fruit, whatever the season.
Russell asserts that the churches "continue to cause suffering" without bothering to note whether they are true or false churches, and whether the church is really an arm of secular government. Thus he deliberately confounds the secular administrative and judicial arm of State churches with their evangelical arm. He overlooks the numerous lives saved from sin and their role in upholding public morality - a morality that he himself despises and regards with total contempt.