Climategate, the so called "cabal of scientists" most secretly colluding to...what? Destroy their careers by publishing fake science?
The e-mails -- thousands of them were combed through to find phrases out of context to somehow show collusion. It's a classic propaganda technique and it is effective in that people who want to believe in conspiracy theories get the fodder they like. And the fact is, you are an avid false conspiracy theorist. You are the perfect target for that kind of fakery.
Climate measurements and modeling is complex. Sometimes the scientists at the bleeding edge get it wrong. Sometimes they find errors in past measurements. These errors are published and made available for all to see. There is then hot debate within the community about why these errors occurred and what to do about them. The process is one of continual improvement and not perfect. That said, nothing has been found to disprove the basic fact that doubling carbon dioxide in the atmosphere causes Earth's surface temperatures to rise. With all the scrutiny given this issue, the basic physics of carbon dioxide's role in raising the earth's surface temperatures as a "greenhouse gas" remains unquestioned by anybody with a better education than a few classes in gun safety.
A climate model is not needed to show that the earth is warming. Glaciers are melting, animal and plant populations are migrating pole-ward and upward into regions they never occupied before. Low lying areas are flooding like never before due to sea level rise. Corals are bleaching due to warmer waters. Deep ocean methane hydride deposits are beginning to bubble off as those waters warm too. Also, permafrost layers are melting and causing havoc in settlments that were built upon a previously stable frozen layer. These and more observations are completely consistent with the temperature measurements and climate model that predict those same events. Nit picking a few measurement errors doesn't change these facts.
And so, false conspiracy theorists and an oil industry that as early as 1980 is on record as acknowledging their role in human caused climate change have to dig into hacked e-mails and stitch together phrases taken out of context to cast doubt on the work of professional scientists. Climategate is a hoax, not climate science.
Now about that completely misinformed truthy factoid about Arctic Sea Ice "become quite high"
First, the north or Arctic Sea Ice pack is SHRINKING. It's the Antarctic Sea Ice pack that has expanded at least in 2014 it did. Taken together the sea ice pack at the north and south poles has shrunk as a whole. So you are fundamentally wrong about this. Why am I not surprised?
But OK, maybe you just misspoke and meant Antarctic when you said Arctic. This is a laughable "conspiracy" theory because nobody is covering this fact up. Here is a link to what NASA said about it:
https://www.nasa.gov/content/goddard/antarctic-sea-ice-reaches-new-record-maximum . In the article they explain that the earth is a complex global system and they are working to understand what's going on. What they are doing to understand why the Antarctic ice pack is expanding is very interesting. I suggest you read the article to find out.
Doesn't change the basic fact that overall, sea ice coverage is shrinking. Or that warm climate mosquitoes have moved northward bringing with them disease and so forth.