Many quotes from the article follow below, as well as my own input.
With regard to the threatened "attacks" - after reading the article and other information I found on-line, I do not believe this is meant as violent terrorism to be performed in an effort to hurt, maim or kill Christians (or others). Bandhan Tigga, the head priest of Sarna Society was quoted as saying to the local media, "We are urging the Christian authorities to remove the statue. If our pleas are ignored, we will be forced to launch surprise attacks on this church to pull down the statue soon."
Prior efforts to remove her have been made: ". . . The local authorities have attempted to broker a truce, but the efforts have so far failed. “We imposed restrictions as one party was trying to pull down the statue. Then we made two parties hold peace meetings. If needed, we shall push for more peace meetings in future,” Sub-divisional officer of Ranchi, Ameet Kumar, told Al Jazeera."
The "offending" statue depicts the Virgin Mary in Sarna-garb: a red-bordered white sari and red blouse, sporting a necklace, bangles and earrings, and holding baby Jesus in a cloth sling tied around her shoulder. (Personally? I think she is beautiful, and if she is within a private building - a Church - her presence there is appropriate.)
The statue has infuriated this nature-worshipping, non-Christian group only because of what she is wearing. They allege Christian missionaries of carrying out proselytisation "under the garb of social work" (a charge denied by the church). Hindu groups have also attempted to reconvert some who they allege were improperly lured into embracing Christianity. Tigga (the head priest) also alleges that the statue is meant to attract local tribespeople to Christianity "by confusing them into believing that she was a tribal woman" from the region. . . she is wearing traditional Sarna dress of red-bordered sari, Mother Mary's complexion is also dark in the statue. She has been made to look like our goddess of Sarna Ma [Mother Nature]. If the statue remains in place, after some decades our future generations will get confused between our Sarna Ma and Mother Mary," Tigga told Al Jazeera.
"As Christians we view Mother Mary as our mother, and as tribals if we see our mothers wearing a red-bordered sari we feel nice. So in that statue we got her draped in our local tribal attire, to which we are emotionally attached," Jesuit priest and social activist Fr Alex Ekka, a member of local Oraon tribe, told Al Jazeera. . ."
"It happens everywhere as part of enculturation of the local tradition. In Tamil Nadu, Kerala, West Bengal, Manipur and other states, Mother Mary is clad in local attire. In Africa her complexion is black."
I agree with so much of the above, and adapting/adopting local culture has been done for centuries by many religions. I truly hope this statue is not meant to confuse their people, but entice their people (no offense meant by the use of that word - it's how I feel, and I mean nothing improper by it). Real education about the Mother should be provided, not deception... and I did not read any quotes where deception is alleged.
"The Christian priests consider our Sarna belief system inferior and uncivilised. We have begun our protest against the sari-clad Mother Mary statue to send out strong messages that we love our religion and culture, and we shall launch a more aggressive movement against their agenda of conversion."
"Prem Shahi Munda, another Sarna leader, said their protest against the new statue should be seen as their struggle to protect the belief and culture of the nature-worshipping people. . . The Jharkhand state secretary of right-wing Viswa Hindu Parishad (VHP), Gangaprasad Yadav, argued that tribal people were too naive and that they did not have any idea of their own religion. "So most often against such conversions by the church they cannot defend themselves on their own. So our [Hindu] organisations often need to step in to thwart the moves related to conversions by the church and save the tribals," Yadav said.. . . " If your own people are that naive and uneducated, then educate them. If you cannot do so, or will not do so, there are others who are willing to step up and offer what they feel to be true in their hearts. The first Caucasians to set foot in the Americas brought their beliefs with them, and although there remains a great deal of hard feelings and conflict about the Natives and what they suffered at the hands of the invaders, the situation is similar.
(PS - Their head priest stated, "She has been made to look like our goddess of Sarna Ma [Mother Nature]." Well, I myself have a statue of Our Lady of Mt. Carmel on one of my own altars. Done with caring and respect, it's the same thing, just the other way `round.)