The youth league was disbanded in 1995 due to rampant problems with neo-Nazism in the ranks, but was reestablished as an independent organization in 1998 before becoming directly associated to the Sweden Democrats.

In 2015, the SDU was threatened with dissociation by the Sweden Democrats after some of its members had were said to have expressed racist statements and its leadership were accused of collaborating with extremist groups such as the neo-fascist Nordic Youth.

The Sweden Democrat leadership had considered Ohlson's views too radical and disobedient towards the mother party and instead endorsed Tobias Andersson and Dennis Dioukarev's campaigns for the position.

[3] The Sweden Democrats subsequently announced that they would break ties with the youth league after an extended conflict with Ohlson's supporters and multiple controversies surrounding SDU members.

The leading members of SDU would then go on to form the right-wing populist party Alternative for Sweden in March 2018.