Original sentence: Elst described some of these controversies in his works:.Koenraad Elst has been at times a controversial figure, and some Indian Marxists have a negative view of Elst's works
Edited sentence: As values and opinions play a dominant role in this matter, the evaluation of such controversies is extremely difficult.He has been able to gain only limited acceptance among the dominant stream of the academic study of South Asia/India both in the West and in India, because many academics, including such as are internationally influential, regard him as biased and agenda-based.He is very much in the centre of debates between the so-called "Hindutva" and the so-called "Indian Marxist" or "pseudo-secular" groups, being either acclaimed or rejected according to the respective stance of those concerned.Koenraad Elst is a controversial figure