Don't let em get you down. They're just suffering from withdrawals. The whole thing must be a mistake and from all reports, the alleged murderer obviously appears to be a 6 foot white guy with ginger hair and a Welsh accent. After all, why would muslims attack Parliament? Hasn't the UK Parliament been largely supportive of immigrant muslim “rights”? For a motive, please choose from the following:

Islamophobia
Racism
Heated Trump rhetoric
Backlash against bigotry and intolerence
Workplace violence
Mental illness
Brexit
Lack of Muslim-friendly safe spaces 
Putin