Hi Shu. I would like to share on how i have shared and benefited my friends through Dorje Shugden practices.
Many people would only seek for divine helps only when there is trouble in their life. Thus, when the incidents happened, i would share the mantra and pictures of Dorje Shugden with them. When their problems solved, their developed faith towards Dorje Shugden. Even when they knew there is a ban, out of curiosity they will read more on the ban, and, through this knowledge eventually they learned more about Tibetan Buddhism and the faith towards Dorje Shugden raise more.
For those friend whom just listen to other people without checking clearly on the ban of Dorje shugden, i found that normally they are not that interest in dharma. All they want is just to pray to a divine and be at peace. For this group of friends, some they just cut of connection with me, some they remain as friend but they respect my religion. As times goes by, when they see my progress on my secular and spiritual path, some friends started to ask me questions about Dorje Shugden. Thus, i find that to bring dharma to people or to bring Dorje Shugden to people, we first must have faith in Dorje Shugden in helping us in our daily life and spiritual path, then only the people around us could feel the benefit and wanted to be like us.