Infantry is on a silver plate before that MG, but a single HE shell from a M10...
Its usually a grenadelauncher that takes it out. Bots tend to fire at anything that is firing at them first, especially if the volume of fire is great.
that single mg is attacked by multiple infantry coming from 3 bases by the time the church is in site, mostly because IT is firing at everyone, pissing them off. By so doing, it fires at each person randomly rather than at one section.
Add deviation that bots face and the fact that its firing from direct front, it tends to be rather ineffectual. Eventually, and ALWAYS, it gets overrun, by bots who manage to make it to rifle-grenade range and hit it successively until its gone.
The issue arises when it is attacked by less than a good number of people, which is fine also. That mg works well to keep bots attacking bases and capping them in order.
You dont cap the church until the road and the chateau are capped, and then you get the numbers required to fan out and overwhelm it.
Remove that and you get Purple Heart Lane-style running gun battles with repetitive cacophony of small arms until the end. That mg adds tactics to an otherwise bland map (SP-wise)