The short answer is No.
I don't understand the use of the words "abduct" and "murder" in the context except as hyperbole and the post seems to have at best a slim grasp of the facts.
The court's decision, summary reasons and judgment are available from Bailii here http://www.bailii.org/ew/cases/EWHC/Fam/2017/972.html.
Why did the court have any say at all? Power is vested by law in the court "exercising its independent and objective judgment in the child's best interests" (para 36). All parties agreed the child lacked capacity to make decisions for his medical treatment. He was represented by a guardian who appointed legal counsel. All parties including the parents agreed the child's "present quality of life is one that is not worth sustaining" (paras 14, 48, 117, 126).
There is a strong presumption in favour of life but it is not absolute (paras 13, 38, 39 vii, 126). The parents' wishes are not paramount (paras 11, 36, 39 x). The "court must do the best it can to balance all the conflicting considerations in a particular case and see where the final balance of the [child's] best interests lies" (paras 11, 13, 38, 39 vi). The court heard from medical experts (paras 15, 18, 21, 33, 35, 63, 91) including an expert witness instructed by the parents who "was able to offer nothing at all to support their case" (paras 91, 92).
The doctor who offered the "pioneering treatment" (that had not been even been tested on mice, para 49) sought by the parents said after discussing with Great Ormand Street's consultant that he "can understand the opinions that he is so severely affected by encephalopathy that any attempt at therapy would be futile. I agree that it is very unlikely that he will improve with that therapy. It is unlikely." (para 18)
The "principal issue" with which the court had to "grapple" was that the treatment was likely futile according to all the experts and it may cause further suffering to the child (para 49).
The court decided that artificial ventilation should be withdrawn and the treating clinicians should provide palliative care only (para 23, 129).