There are tensions in all political parties. They tend to revolve around personalities rather than policy although recent events in the British Labour Party suggest they managed to achieve the double. Third parties are particularly vulnerable to this witness what happened with the Alliance; the knifing of Tracey Martin by a nakedly ambitious Ron Mark and the revolving door that seems to define the Green's caucus.
UKIP seems to have excelled itself in this regard. Currently polling in the 10-15% range with some commentators suggesting it is poised to make huge inroads in the Labour Party heartland vote.
Right now it is in crisis. Their newly elected leader, Diane James, resigned after just 18 days on the job citing frustration and personal family reasons. Then yesterday two of their MEPs were involved in a fight in the Party Room at Strasbourg which left one of their number, Steven Woolfe, hospitalised and needing a brain scan after he collapsed. On top of all that you have Arron Banks, millionaire donor to UKIP threatening to leave the Party if Neil Hamilton, leader of UKIP Wales, was allowed to remain in the Party or if Steven Woolfe was again barred from standing for the leadership. Then you have Dpuglas Carswell, their only Westminster MP, marginalised by elements still loyal to Nigel Farage the ex (and now back as interim) leader.