If you’ve ever been in a Sikh discord chat you’ll find out Sikhism is 100% syncretic with Islam and the teachings of Muhammad.
The Quran says: When you are superior in strength to the infidel fight them until they pay tribute and feel themselves subdued.
Those not willing to submit to Islam will be given 4 months to flee or comply. After the 4 month period has passed “then kill the non-believers wherever you find them and capture them and besiege them and sit in wait for them at every place of ambush”