Why do more right-leaning people seem more likely to voice political opinions to strangers, assuming everyone agrees - and why has it got worse recently?

Before anyone jumps in - I'm not looking to start a political debate, and I'm not a staunch Labour supporter, nor do I think Starmer is a particularly good politician. I'm just curious about a behavioural pattern I keep noticing.

Over the last few weeks I've had to smile and nod through multiple unsolicited political comments from relative strangers - and it's almost exclusively happened since Labour came to power.

What's strange is there was plenty to talk about before (Brexit, Boris, Covid, Liz Truss etc) yet I barely remember politics coming up randomly in conversation during any of it.

 A few recent examples: 

• Conversations with colleagues (mostly 55+ white men) that have veered into "the government needs to go" territory, completely unprompted. I've also heard the term "boat people" used more than once.  
• At a house viewing, the vendor brought up getting rid of Starmer multiple times out of nowhere. My partner tried to redirect by mentioning Trump & the Iranian war in the context of mortgage rates and the vendor visibly bristled.  
• A colleague venting about "a new scandal every day" - when I pointed out it was nothing compared to the Johnson era, he rolled his eyes at me and then started talking about Dianne Abbott…  

What puzzles me isn't the opinions themselves (although yes, it does a little) but it's the unsolicited nature and the assumption that I'll obviously agree. No "I don't know if you follow politics but..."  just launching straight into, as if it's self-evident common ground.

It also seems oddly asymmetric. I've never had a stranger tell me Corbyn needs to come back, or a colleague slag off Farage expecting me to nod along.

Curious if others have noticed this, or if I'm just unlucky with my sample? Is there an explanation for it?