This is and has always been the biggest problem with politics - it’s pure tribalism created by ourselves in the shape of ‘Conservative or Labour’.
People lose their own personal ideologies as they feel this desperate need to defend all policies advocated by ‘their’ political party - hell I’m guilty of it, as are most on this forum and across most of the UK.
The idea that you might generally be left or right leaning but appreciate/agree with the opposition on a certain policy isn’t seen as being objective or a solution to getting the best out of the system or holding those in charge to account, but instead a sacrifice to allow you to argue for your party to the death.
Perhaps I’m being exceptionally hypocritical in light of what I’ve just written, but you only have to hear the constant Jeremy Corbyn arguments/slander if you voted for a right wing government to see why we have such divide in this country. People are willing to overlook the failings of their party or leader or take you with some evil brush because of the sheer hatred for the opposition. The loyal voters of Boris Johnson and the conservatives are the same and it’s perhaps not occurred to me until this pandemic.
It’ll never happen, but the best thing for this country would probably be a strong multi party system that don’t represent historical ideologies or come with a form of baggage and that don’t force people into feeling the need to back their entire manifesto, but find a healthy medium that negates the constant us vs them mentality and does genuinely demand the best in leadership.