I wrote a post several years ago about my struggles with being autistic. I didn't think much of it at the time - I just wanted to vent a bit and I had been using my blog for that since I was a teenager. I applied for a job a couple of weeks after I wrote that post and I was asked during an interview how I thought my autism might impact my work. I was confused at first because I never disclosed that information to them, but perhaps understandably they Googled my name and found my blog at the top of Google.
I started my blog back in 2010 when people didn't care so much about anonymity online. The idea that an employer might check your social media or Google your name was still quite new back then, whereas today I'd guess around 80% of the places I apply to seem to Google my name before conducting an interview. In hindsight I wish I kept the blog anonymous, but there's also technical content on there which I'm proud of and want associated to myself. Either way I'm now in a difficult position where I can't really use my blog candidly any more because I have to consider it more as an extension of my CV.
If you want to express yourself I'd keep it strictly anonymous. If you want to write technical content which you want associated with yourself you should probably do that somewhere else and never mix the two. Having a blog at [firstname][lastname].[TLD] where you express anything personal, especially if that includes political views or thoughts on cultural events is probably not a good idea in this day and age. Arguably even anonymous blogs that discuss politics are dangerous.