All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
Islam has some rules and conditions regarding man’s looking at women; but these rules differ from one woman to another a woman could be a wife, an unmarriageable woman, or a marriageable woman, each category has separate rulings. For details, refer to Fataawa 83541 and 90591.
As for the statement that the one who looks at a marriageable woman must commit suicide it has nothing to do with Islam, rather it is a false accusation against it. Perhaps the writer knows this fact but his purpose is to ridicule and mock Islam. If he claims freedom and the respect of others’ feelings, then how could he do that and write whatever he desires! What are the benefits the west achieved by turning woman into a cheap commodity and a worn-out item! That has led to huge immorality, high crime rate and increase in the number of illegitimate children and forced the western intellectuals to perceive the dangers of mixing between males and females.
Therefore, you should try your best to explain to the man who sent you this message the merits of Islam, especially if he is a non-Muslim. He should learn about Islam through the sayings of the Muslims and not from the baseless writings. For more benefit about how to call non-Muslims to Islam, refer to Fataawa 81979, 88906, 88051 and 84345.