divisive

Definitions:

Creating division or discord.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
Forming division or separation: creating discord.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)
Forming division or distribution; creating division or discord.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)

Usage examples:

Arguing from such historical precedents as these one might easily assume a like fate for the Gnosticism of our own time, and yet a note of caution is needed here for there are divisive religious movements which have as yet neither failed nor been absorbed in that from which they took their departure.
- Modern Religious Cults and Movements by Gaius Glenn Atkins
This done, the same economic motive- which, while the capital remained in private hands, was a divisive influence tending to destroy that public spirit which is the breath of life in a democracy- became the most powerful of cohesive forces, making popular government not only ideally the most just but practically the most successful and efficient of political systems.
- Equality by Edward Bellamy
For my own part, I promised, as all ministers do at their ordination, never, directly or indirectly, to endeavour her subversion, or to follow divisive courses, but to maintain her unity and peace against error and schism, whatsoever trouble or persecution might arise; and now, in agreement with my solemn ordination engagements, have I determined to hold by her to the last.
- Leading Articles on Various Subjects by Hugh Miller