the Dalai Lama's life is not shortened... Tibet is not seeking independence (so DS practice will not affect independence) so what is the issue?
Agreed with everyone above, I have never experience any negative effects from practicing Dorje Shugden, and I don't think by practicing Manjushri will ever experience any negative effect. Remember HHDL make an official announcement not long ago saying that HH will only decide his reincarnation when HH is around 90 yrs old, is that consider short life ? I'm not cursing HHDL, but it's just doesn't make sense.
Beside the problem created by ex TGIE or CTA for now, I do not see NKT, Shar Gaden or Serpom having any problem with their monastery, sponsors or any tragic happen to them. If by practicing Dorje Shugden will bring negative effects, how to explain the 1100 Kadampa Centers and branches in 40 countries around the world, which benefit thousand of thousand people ?
Regarding Tibet independents, I'm really don't care. First of all I'm not Tibetan, secondly I'm not interested in politic at all.
My conclusion is all the negative effect that CTA warn us, look quite positive to me, and i will continue DS practice.