Where in US “culture” has it been acceptable for two straight (never mind otherwise) males to hold hands? This kind of talk sounds like cultural anthropologists’ justifications for anything.
one of my uncles, in the 1940s, and my grand dad, of the same generation as that uncle, were best of friends and were known to hold hands at some point, when we were all together at big family gatherings; my grandma became the chief comforter to that uncle on my grand dads death - he was unconsolable - even though she was grieving herself; no one in the family ever gave us any negative comments about the closeness demonstrated by my uncle and grandpa
may dad though, a decade later, made a comment, in front of me and his other sons, verbally frowning on it; while my mom stated immediately that dad was right because times changed and we shouldn’t let people think poorly of us, we should fit in; we asked her about grandpa and uncle Harley, were they queer; she said no,m they were best friends and added that was a different time;
fitting in represents conformity, and it is usually based on our perceptions; nothing has any more value than the value we decide it has; there is nothing biblical that says “manliness” means lack of and lack of demonstrable, platonic affection; just reread what scripture has to say about David and Johnathon