No One
My understanding is that due to its overall economic conditions today, Russia, a country much weaker than Soviet unx, does not have enough military power to defeat NATO in a hot war without invoking nuclear weapons (e.g., the military budget of Russian is ~$70 billion, compared with ~$700 billion military budget for U.S), although they might have the motivation to start one. See here for NATO's military budget.
I believe there are many ways for NATO to confront Russia. For example, if there are cyber-attacks from Russia, simply fight back with cyber techniques. Sanctions are also good tools to use.
However, the enlargement of NATO in the recent years seemed to raise the risk of hot war with Russia. For example, NATO tried to build missile defense complex in Poland and even trying to include Ukraine, neighbor of Russia into their organization. What is their motivation of doing so?
Why can't NATO simply let the Eastern Europe stay (at least militarily) neutral between NATO and Russia? What is the motivation of their expansion in Eastern Europe, irritating Russian, and at the cost of a potential Russia-Ukraine war which could involve NATO themselves?

我的理解是,鑒于俄羅斯如今的整體經(jīng)濟狀況,它是一個比蘇聯(lián)弱得多的國家,在不用核武器的情況下,沒有足夠的軍事力量在熱戰(zhàn)中擊敗北約(例如,俄羅斯的軍事預(yù)算約為700億美元,而美國的軍事預(yù)算約為7000億美元),所以北約可能會有故意挑起戰(zhàn)爭的動機。北約的軍事預(yù)算自己搜。
我認為北約有很多方法來對抗俄羅斯。例如,如果俄羅斯發(fā)動網(wǎng)絡(luò)攻擊,就用網(wǎng)絡(luò)技術(shù)進行反擊。制裁也是很好的手段。
然而,北約近年來的東擴似乎增加了與俄羅斯爆發(fā)熱戰(zhàn)的風(fēng)險。例如,北約試圖在波蘭建立導(dǎo)彈防御系統(tǒng),甚至試圖將俄羅斯的鄰國烏克蘭納入組織。他們這樣做的動機是什么?
為什么北約不能讓東歐在北約和俄羅斯之間保持(至少在軍事上)中立呢?他們在東歐擴張、激怒俄羅斯,并以可能引發(fā)涉及北約自身的俄烏戰(zhàn)爭為代價,其動機是什么?