Yes, let's alienate the world's #1 superpower and long-time ally because we don't like the president. That's a great winning strategy for a country to take.
I fear that the way you call people "Loony Left" means that nothing will be accomplished by trying to engage with you. You are just going to throw out the same old "our team is best" talking points from Fox news. It's a shame that our country has gotten to this point, where we can't even have a discussion.
However, I'll give it a go. Can we focus on this one point though? No name calling, no sarcasm, let's just consider your central argument that the UK should show respect to Donald Trump and flatter him on his upcoming visit because it's beneficial to be on Trump's good side. If we don't alienate Trump, he'll be our ally.
Id argue that was precisely the strategy that France tried, Macron threw a giant military parade in his honour and shamelessly flattered Trump. Unfortunately, it has gotten France nothing. Trump was not influenced at all when it came to things that France wanted, like staying in the Pais accord or staying in the Iranian Nuclear deal. Theresa May went there, offered him a state visit and even HELD HIS HAND on the stairs. Trump's love lasted about a week before he was attacking her and the UK on Twitter again. It simply doesn't work to try and be Trump's ally, he has no loyalty of any kind to anyone other than Putin. All of our traditional allies were roundly dismissed at the G7 conference , France included. Flattery got them nowhere.
So here's my question for you - What do you think it means for American influence in the world if everyone has figured out that you can't do a deal with Trump? Politics is the art of influence, I'll support you if you do this for me later. Please explain to me how it makes America great again on the world stage if we can't influence anyone because Trump is so untrustworthy?