America First does not mean that the US likes to be alone in military adventures. The size of the military support is I think not that important. This is a traditional burden of more leftish parties (although currently the populist right-wing parties in Europe make themselves vulnerable in the same way in their endeavours to internationalise) They need to be firm on internationalist solidarities to feed the comfort zones within their parties, but reality is that these zones (often single issue autonomous groups/movements) are insatiable, and shift further with every room given, without realising what they do and cause in terms of antagonising broader support potential and taking away governmental manoevring room for their main political party that has a wider and inclusive political program. But that all does not mean that Corbyn is wrong in having (as a politician and person) a clear pro-Palestinian opinion. In terms of international law it is an abomination. The tension I see is that he should A. not be "forced" to confess those credo's all the time (trust from his group).... and B. not doing that on his own account just to feel "happy and energised" in immerging into it. The Rupert Murdoch press is BTW quite busy lately in the dirty dirt activities re Corbyn.