تَلَهَّى (distracted): It is to do something which is not requested of you such it distracts you from that which is requested of you and stops you from that which is of benefit.
Islam came to propose to mankind principles and values which would reform their condition. Therefore, people rushed upon it as the Prophet (saws) had convinced them of these principles, behaviours and values.
The Muslims had presented these values through their actions and not only their words. Thus, they became the examples which were followed by the whole universe. People entered in throngs into the religion of Allah (swt) via these examples, not through the sword nor through terrorism, extremism or force.
The proof of this is that Islam spread greatly in this way among all the nations of the world through the businessmen who demonstrated these principles, behavior and values.