It was just a Scottish civil war between Highlanders and Lowlanders.
No. The campaign was of international significance; it was a bid to reclaim both the English and Scottish thrones with support from not only Scotland, but Ireland, England and Europe. Though donning Highland garb for psychological effect, the Jacobite army was made up of both Highland and (about one-third) Lowland troops, not to mention French and Irish regiments.

Lowlanders were forced to join the Jacobite army.
No. Recruiting records show the Lowlands provided many volunteers, including some gentry. Jacobite support was strong in most areas north of the River Tay. England also supplied some volunteers, including a small regiment. Highlanders were probably more often pressed into service than Lowlanders. The act of pressing was not exclusive to the Jacobites; it was also used by most other contemporary armies, including the English army.

More Scots fought against the Jacobites than for them.
No. Contemporary records clearly show otherwise: Cumberland’s army contained no more than 2500 Scots. By contrast, Prince Charles’ army included well over 10,000 Scots — probably closer to 15,000.

The Jacobite army's organisation was a backward clan-based relic, with inexperienced commanders and untrained rag-bag troops.
No. The Jacobite army’s organisation was much the same as that of most other contemporary armies. Many Jacobite commanders had seen service in the in various armies, and field commander George Murray was easily one of the best of the time. It is interesting to note that while Culloden was Prince Charles’ only defeat (caused by the decision to entrench and defend Inverness as Jacobite funds were very low), it was Cumberland’s only ever victory. While many Jacobite soldiers were of poor appearance, some without even shoes, they were among the most feared troops the English faced. The hardiness, individuality, and resourcefulness of Highlanders made them known as some of the best troops in the later British army.

London was never threatened by the Jacobites.
No. While it would have been bad form for the George II (of England) and his officials to publicly appear threatened, they had made evacuation plans for themselves, and (some have speculated) surrender papers: London had no real defending forces and the Jacobite army was only two days march away.

Jacobites soldiers were ordered to “give no quarter” at Culloden.
No. This ‘order’ was based on a crude forgery and used by English commanders to dehumanise the Scots and perpetuate their image as non-Protestant savages. It was later used by the English to justify their own refusal of quarter when they butchered prisoners, wounded, and even onlookers (including children) after their ‘victory’.

We recommend The Myth of the Jacobite Clans) (Murray G. H. Pittock, Edinburgh University Press, 1995) for further information.